21087 (number)

21087 is an odd 5-digits composite number following 21086 and preceding 21088. In scientific notation, it is written as 2.1087 × 10^4. The sum of its digits is 18. It has a total of 4 prime factors and 16 positive divisors. There are 12600 positive integers (up to 21087) that are relatively prime to 21087.

Interesting facts

Basic properties

Name

Name twenty-one thousand eighty-seven

Notation

Scientific notation 2.1087 × 10^4
Engineering notation 2.1087 × 10^3

Prime Factorization of 21087

Prime Factorization 11 × 9 × 3 × 71

Composite number
ω Distinct Factors 4
Total number of distinct prime factors
Ω Total Factors 4
Total number of prime factors
rad Radical 21087
Product of the distinct prime numbers

The prime factorization of 21087 is 11 × 9 × 3 × 71. Since it has a total of 4 prime factors.

Most popular turbo-numbers

8, 5, 16, 76, 456, 758, 8423, 7046, 59180, 22960, 461981, 139875, 1912972, 3856193, 77431501, 81467660, 233016625, 953959365, 6211882554, 7983549992

Basic calculations (n = 21087)

Multiplication

n×y
n×2 42174
n×3 63261
n×4 84348
n×5 105435

Division

n÷y
n÷2 10543.5
n÷3 7029
n÷3 5271.75
n÷5 4217.4

Exponentiation

ny
n2 444661569
n3 9376578505503
n4 197723910945541761
n5 4.1694041101086E+21

Nth Root

y√n
2√n 145.21363572337
3√n 27.627288700177
4√n 12.050462054352
5√n 7.3249212439694

Divisors of 21087

1, 3, 9, 11, 27, 33, 71, 99, 213, 297, 639, 781, 1917, 2343, 7029, 21087

16 divisors

τ Total Divisors 16
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -21086
Sum of the proper positive divisors of n
A Arithmetic Mean 0.0625
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 16
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 21087 can be divided by 16 positive divisors. The sum of these divisors (counting 21087) is 1, the average is 0.0625.

Base conversion 21087

Base System Value
2 Binary 101001001011111
3 Ternary 1001221000
4 Quaternary 11021133
5 Quinary 1133322
6 Senary 241343
8 Octal 51137
10 Decimal 21087
12 Duodecimal 10253
16 Hexadecimal 525f
20 Vigesimal 2ce7
36 Base36 g9r

Cryptographic Hash Functions

md5 794b7ff3de411a7bb686761ca410038c
sha1 ef76a4c2acd19e26b5ef9b87b7b0ae793b8d4fe8
sha256 99dfaba20190e11705758f04fc73675417cd96bd3aaed30c02ce42645011cd95
sha512 dee8854d02e54310f1c28c0c1581be00d48cd95a7bc1558f6c532e1348bd4689ad0dd8e5e9d1cb50fbf7db186920ba30b0ac02b966458f94b6a89166d5b73c65
ripemd-160 00d9be7d0993902ac0ab13569a8c7b001efc625e

21087 as geometric shapes

Circle

Radius = n
Diameter 42174
Circumference 132493.5285725
Area 1396945518.5041

Sphere

Radius = n
Volume 39276520198262
Surface area 5587782074.0164
Circumference 132493.5285725

Square

Length = n
Perimeter 84348
Area 444661569
Diagonal 29821.521389761

Cube

Length = n
Surface area 2667969414
Volume 9376578505503
Space diagonal 36523.755379205

Equilateral Triangle

Length = n
Perimeter 63261
Area 192544107.42032
Altitude 18261.877689602

Triangular Pyramid

Length = n
Surface area 192544107.42032
Volume 1105040374261.5
Height 9940.5071299205