Math question: What is the sum of the digits of the number 2145?

To find the sum of the digits in the number 2145, we first observe that 2145 has four digits. By decomposing the number, we obtain 2 + 1 + 4 + 5 = 12. Therefore, the sum of the digits in the number 2145 is 12. Explanation: We can break down the number 2145 into its individual digits: 2, 1, 4, and 5. Then, by adding these digits together, we find that 2 + 1 + 4 + 5 equals 12. Thus, the sum of the digits in the number 2145 is indeed 12.

Math question: Find the integer closest to the square root of 2145, when rounded to the nearest whole number. Subtract the sum of the digits of this integer from the cube of the integer. What is the resulting value?

To find the closest integer to the square root of 2145, we calculate √2145 ≈ 46.34, which rounds to 46. The sum of the digits of 46 is 4 + 6 = 10. Now, let's find the cube of 46, which gives us 46^3 = 97336. Subtracting the sum of digits (10) from this value, we obtain 97336 - 10 = 97326. Therefore, the resulting value is 97326.

Math question: What is the digit in the hundred's place of the number 2145 when it is multiplied by the sum of its digits squared and then divided by twice the number formed by its last two digits?

To find the digit in the hundred's place, we need to evaluate (2 + 1 + 4 + 5)^2 = 12^2 = 144. Then, we divide 2145 by twice the number formed by its last two digits, which is 45 × 2 = 90. So, 2145 ÷ 90 = 23.8333... The digit in the hundred's place is 2.

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

2145 (number)

2145 is an odd 4-digits composite number following 2144 and preceding 2146. In scientific notation, it is written as 2.145 × 10^3. The sum of its digits is 12. It has a total of 3 prime factors and 8 positive divisors. There are 960 positive integers (up to 2145) that are relatively prime to 2145.

Interesting facts

2145 has 8 divisors, whose sum is 2688
The reverse of 2145 is 5412
Previous prime number is 13

Basic properties

Is Prime? no
Number parity odd
Number length 4
Sum of Digits 12
Digital Root 3

Name

Name	two thousand one hundred forty-five

Notation

Scientific notation	2.145 × 10^3
Engineering notation	2.145 × 10^3

Prime Factorization of 2145

Prime Factorization 15 × 13 × 11

Composite number

ω	Distinct Factors	3	Total number of distinct prime factors
Ω	Total Factors	3	Total number of prime factors
rad	Radical	2145	Product of the distinct prime numbers

The prime factorization of 2145 is 15 × 13 × 11. Since it has a total of 3 prime factors.

Most popular turbo-numbers

2, 6, 40, 88, 651, 744, 9847, 91, 74695, 4500, 139660, 683540, 6128572, 6138754, 99482373, 45478160, 166216950, 478456115, 1891602940, 9922761898

Basic calculations (n = 2145)

Multiplication

n×y

n×2	4290
n×3	6435
n×4	8580
n×5	10725

Division

n÷y

n÷2	1072.5
n÷3	715
n÷3	536.25
n÷5	429

Exponentiation

n^y

n²	4601025
n³	9869198625
n⁴	21169431050625
n⁵	45408429603590625

Nth Root

^y√n

²√n	46.314144707638
³√n	12.896615902173
⁴√n	6.8054496330248
⁵√n	4.6375164090755

Divisors of 2145

1, 11, 13, 15, 143, 165, 195, 2145

8 divisors

τ	Total Divisors	8	Total number of the positive divisors of n
σ	Sum of Divisors	1	Sum of all the positive divisors of n
s	Aliquot Sum	-2144	Sum of the proper positive divisors of n
A	Arithmetic Mean	0.125	Returns the sum of divisors (σ(n)) divided by the total number of divisors (τ(n))
G	Geometric Mean	1	Returns the nth root of the product of n divisors
H	Harmonic Mean	8	Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 2145 can be divided by 8 positive divisors. The sum of these divisors (counting 2145) is 1, the average is 0.125.

Base conversion 2145

Base	System	Value
2	Binary	100001100001
3	Ternary	2221110
4	Quaternary	201201
5	Quinary	32040
6	Senary	13533
8	Octal	4141
10	Decimal	2145
12	Duodecimal	12a9
16	Hexadecimal	861
20	Vigesimal	575
36	Base36	1nl

Cryptographic Hash Functions

md5	c182f930a06317057d31c73bb2fedd4f
sha1	95449c47c75d1dd98d563a8462e945d5b44381ef
sha256	41332273b0913dad65df2ba070dd6406dacff6636e0eccfa267e8d35a6ba6209
sha512	9a1988dfc5b8b7e17451f79f344c53b59cf6a6f1bc59138bb680f4842d1d5ae2af52bf92213b4fff5bfb913a8eb580289c071020226f8c807de5cc6da0392362
ripemd-160	1a72245853ef9afd0356a0a0587be59f4b21cd69

2145 as geometric shapes

Circle

Radius = n

Diameter	4290
Circumference	13477.4324839
Area	14454546.338983

Sphere

Radius = n

Volume	41340002529.491
Surface area	57818185.355932
Circumference	13477.4324839

Square

Length = n

Perimeter	8580
Area	4601025
Diagonal	3033.4880912903

Cube

Length = n

Surface area	27606150
Volume	9869198625
Space diagonal	3715.2489822352

Equilateral Triangle

Length = n

Perimeter	6435
Area	1992302.2667236
Altitude	1857.6244911176

Triangular Pyramid

Length = n

Surface area	1992302.2667236
Volume	1163096212.1024
Height	1011.1626970968