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

21000721 (number)

21000721 is an odd 8-digits composite number following 21000720 and preceding 21000722. In scientific notation, it is written as 2.1000721 × 10^7. The sum of its digits is 13. It has a total of 2 prime factors and 4 positive divisors. There are 18000612 positive integers (up to 21000721) that are relatively prime to 21000721.

Interesting facts

21000721 has 4 divisors, whose sum is 24000832
The reverse of 21000721 is 12700012
Previous prime number is 7

Basic properties

Is Prime? no
Number parity odd
Number length 8
Sum of Digits 13
Digital Root 4

Name

Name	twenty-one million seven hundred twenty-one

Notation

Scientific notation	2.1000721 × 10^7
Engineering notation	2.1000721 × 10^6

Prime Factorization of 21000721

Prime Factorization 7 × 3000103

Composite number

ω	Distinct Factors	2	Total number of distinct prime factors
Ω	Total Factors	2	Total number of prime factors
rad	Radical	21000721	Product of the distinct prime numbers

The prime factorization of 21000721 is 7 × 3000103. Since it has a total of 2 prime factors.

Most popular turbo-numbers

2, 7, 57, 39, 864, 944, 4305, 697, 32668, 32467, 289025, 50260, 3174083, 4872503, 89461020, 27669896, 863444622, 774433371, 432930598, 2047204710

Basic calculations (n = 21000721)

Multiplication

n×y

n×2	42001442
n×3	63002163
n×4	84002884
n×5	105003605

Division

n÷y

n÷2	10500360.5
n÷3	7000240.3333333
n÷3	5250180.25
n÷5	4200144.2

Exponentiation

n^y

n²	441030282519841
n³	9.2619539157504E+21
n⁴	1.9450771009953E+29
n⁵	4.0848021521491E+36

Nth Root

^y√n

²√n	4582.6543618301
³√n	275.89557503742
⁴√n	67.695305316027
⁵√n	29.137134656632

Divisors of 21000721

1, 7, 3000103, 21000721

4 divisors

τ	Total Divisors	4	Total number of the positive divisors of n
σ	Sum of Divisors	1	Sum of all the positive divisors of n
s	Aliquot Sum	-21000720	Sum of the proper positive divisors of n
A	Arithmetic Mean	0.25	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	4	Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 21000721 can be divided by 4 positive divisors. The sum of these divisors (counting 21000721) is 1, the average is 0.25.

Base conversion 21000721

Base	System	Value
2	Binary	1010000000111001000010001
3	Ternary	1110111221120111
4	Quaternary	1100013020101
5	Quinary	20334010341
6	Senary	2030041321
8	Octal	120071021
10	Decimal	21000721
12	Duodecimal	7049241
16	Hexadecimal	1407211
20	Vigesimal	6b51g1
36	Base36	ci49d

Cryptographic Hash Functions

md5	4ddb3f10b56ad3bf8279e52c7927d5a5
sha1	d94c122d988dc876743e4cc17384ccef681241c6
sha256	5b69ed0e8f056e2756756ad20ee1df1ff9e8c838d4e0a31f42ff56118d9e234c
sha512	eaa0f298c15a945d3ef913b8c2db4600b4714f54c18f31189b459f0a741ce390459757a07fc413e90624aa70425dc2cfa2b1b2af943bbf21aa70eae7eff8282e
ripemd-160	5827a8eac315fefaaf0c57e11cadebb170af4eab

21000721 as geometric shapes

Circle

Radius = n

Diameter	42001442
Circumference	131951421.62738
Area	1.385537495575E+15

Sphere

Radius = n

Volume	3.8796381839478E+22
Surface area	5.5421499822999E+15
Circumference	131951421.62738

Square

Length = n

Perimeter	84002884
Area	441030282519841
Diagonal	29699504.457813

Cube

Length = n

Surface area	2646181695119046
Volume	9.2619539157504E+21
Space diagonal	36374315.767579

Equilateral Triangle

Length = n

Perimeter	63002163
Area	1.9097171425021E+14
Altitude	18187157.883789

Triangular Pyramid

Length = n

Surface area	1.9097171425021E+14
Volume	1.0915317368107E+21
Height	9899834.8192712