Question: If the number 1381 is multiplied by its largest prime factor and then divided by the sum of its digits, what is the quotient?

To find the largest prime factor of 1381, we start by dividing it by the smallest prime number, 2. However, 1381 is not divisible by 2. Moving on to the next prime number, 3, we see that 1381 is not divisible by 3 either. Continuing this process, we find that the largest prime factor of 1381 is the number itself, 1381. Now, let's compute the sum of its digits: 1+3+8+1 = 13. Finally, we calculate the quotient: 1381 * 1381 ÷ 13 = 144259.

Math question: If 1381 is divided by 9 and the quotient is multiplied by 3, what is the result?

To find the result, we first divide 1381 by 9, which gives 153 as the quotient. Then, multiplying the quotient (153) by 3, we get 459 as the result. Therefore, if 1381 is divided by 9 and the quotient is multiplied by 3, the result is 459.

Math question: What is the sum of all the even integers between 1 and 1381 (inclusive)?

To find the sum of all even integers between 1 and 1381, we first determine the number of even numbers. Since every second number is even, we divide the total numbers by 2: (1381 - 1)/2 = 690. Then, we can find the sum using the formula for the sum of an arithmetic series: S = (n/2)(first term + last term), where n represents the number of terms. The first term is 2, and the last term is 1380 (the largest even number less than 1381). Thus, the sum is S = (690/2)(2 + 1380) = 690 * 1382 = 953,580. The sum of all even integers between 1 and 1381 is 953,580.

Max	9223372036854775807
25835	Positive integer
0b10001100	Binary number
01771452	Octal number
0x129abf	Hex number
5.012 * 10^7	Scientific notation
2^4 * 5	Factorized form
*	Random number

1381 (number)

1381 is an odd 4-digits prime number following 1380 and preceding 1382. In scientific notation, it is written as 1.381 × 10^3. The sum of its digits is 13. It has a total of 1 prime factors and 2 positive divisors. There are 1380 positive integers (up to 1381) that are relatively prime to 1381.

Interesting facts

1381 has 2 divisors, whose sum is 1382
The reverse of 1381 is 1831
Previous prime number is 1

Basic properties

Is Prime? yes
Number parity odd
Number length 4
Sum of Digits 13
Digital Root 4

Name

Name	one thousand three hundred eighty-one

Notation

Scientific notation	1.381 × 10^3
Engineering notation	1.381 × 10^3

Prime Factorization of 1381

Prime Factorization 1381

Composite number

ω	Distinct Factors	1	Total number of distinct prime factors
Ω	Total Factors	1	Total number of prime factors
rad	Radical	1381	Product of the distinct prime numbers

The prime factorization of 1381 is 1381. Since it has a total of 1 prime factors.

Most popular turbo-numbers

3, 1, 4, 14, 563, 256, 4522, 356, 46976, 85553, 674430, 560877, 9647482, 6498316, 10372921, 17372773, 870855219, 171177712, 400921303, 772816557

Basic calculations (n = 1381)

Multiplication

n×y

n×2	2762
n×3	4143
n×4	5524
n×5	6905

Division

n÷y

n÷2	690.5
n÷3	460.33333333333
n÷3	345.25
n÷5	276.2

Exponentiation

n^y

n²	1907161
n³	2633789341
n⁴	3637263079921
n⁵	5023060313370901

Nth Root

^y√n

²√n	37.161808352124
³√n	11.136051383973
⁴√n	6.0960485851184
⁵√n	4.2465743842306

Divisors of 1381

1, 1381

2 divisors

τ	Total Divisors	2	Total number of the positive divisors of n
σ	Sum of Divisors	1382	Sum of all the positive divisors of n
s	Aliquot Sum	1	Sum of the proper positive divisors of n
A	Arithmetic Mean	691	Returns the sum of divisors (σ(n)) divided by the total number of divisors (τ(n))
G	Geometric Mean	37.175260590882	Returns the nth root of the product of n divisors
H	Harmonic Mean	1.9985528219971	Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 1381 can be divided by 2 positive divisors. The sum of these divisors (counting 1381) is 1382, the average is 691.

Base conversion 1381

Base	System	Value
2	Binary	10101100101
3	Ternary	1220011
4	Quaternary	111211
5	Quinary	21011
6	Senary	10221
8	Octal	2545
10	Decimal	1381
12	Duodecimal	971
16	Hexadecimal	565
20	Vigesimal	391
36	Base36	12d

Cryptographic Hash Functions

md5	d82118376df344b0010f53909b961db3
sha1	feef930093fe07af383a9b8a7c02d0547d6f3f1e
sha256	a39ff608d7c5bc24e03340701adfa5728b72b6b9933f56ffb477ec888ac5c0d6
sha512	428a4d9c069ac40369110a9e781834d017d0238cb992c2a9cf23ae5bdcfe441eb018a9a18c4f511558db400995b518de2a9d2b48092cbab93dbf48d99f040007
ripemd-160	13670e8407a362b55f58c83ece543030c8248cff

1381 as geometric shapes

Circle

Radius = n

Diameter	2762
Circumference	8677.078909215
Area	5991522.986813

Sphere

Radius = n

Volume	11032390993.052
Surface area	23966091.947252
Circumference	8677.078909215

Square

Length = n

Perimeter	5524
Area	1907161
Diagonal	1953.0289296372

Cube

Length = n

Surface area	11442966
Volume	2633789341
Space diagonal	2391.9621652526

Equilateral Triangle

Length = n

Perimeter	4143
Area	825824.93755347
Altitude	1195.9810826263

Triangular Pyramid

Length = n

Surface area	825824.93755347
Volume	310395050.53966
Height	651.00964321241