21487 (number)

21487 is an odd 5-digits prime number following 21486 and preceding 21488. In scientific notation, it is written as 2.1487 × 10^4. The sum of its digits is 22. It has a total of 1 prime factors and 2 positive divisors. There are 21486 positive integers (up to 21487) that are relatively prime to 21487.

Interesting facts

Basic properties

Name

Name twenty-one thousand four hundred eighty-seven

Notation

Scientific notation 2.1487 × 10^4
Engineering notation 2.1487 × 10^3

Prime Factorization of 21487

Prime Factorization 21487

Composite number
ω Distinct Factors 1
Total number of distinct prime factors
Ω Total Factors 1
Total number of prime factors
rad Radical 21487
Product of the distinct prime numbers

The prime factorization of 21487 is 21487. Since it has a total of 1 prime factors.

Most popular turbo-numbers

1, 6, 15, 50, 918, 310, 1828, 6570, 11291, 90857, 657813, 127040, 4082173, 2195906, 66267265, 67120767, 167008877, 534714942, 6039089815, 2289490325

Basic calculations (n = 21487)

Multiplication

n×y
n×2 42974
n×3 64461
n×4 85948
n×5 107435

Division

n÷y
n÷2 10743.5
n÷3 7162.3333333333
n÷3 5371.75
n÷5 4297.4

Exponentiation

ny
n2 461691169
n3 9920358148303
n4 213158735532586561
n5 4.5801417503887E+21

Nth Root

y√n
2√n 146.58444665107
3√n 27.800883294054
4√n 12.107206393346
5√n 7.3525020922978

Divisors of 21487

1, 21487

2 divisors

τ Total Divisors 2
Total number of the positive divisors of n
σ Sum of Divisors 21488
Sum of all the positive divisors of n
s Aliquot Sum 1
Sum of the proper positive divisors of n
A Arithmetic Mean 10744
Returns the sum of divisors (σ(n)) divided by the total number of divisors (τ(n))
G Geometric Mean 146.58785761447
Returns the nth root of the product of n divisors
H Harmonic Mean 1.9999069247952
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 21487 can be divided by 2 positive divisors. The sum of these divisors (counting 21487) is 21488, the average is 10744.

Base conversion 21487

Base System Value
2 Binary 101001111101111
3 Ternary 1002110211
4 Quaternary 11033233
5 Quinary 1141422
6 Senary 243251
8 Octal 51757
10 Decimal 21487
12 Duodecimal 10527
16 Hexadecimal 53ef
20 Vigesimal 2de7
36 Base36 gkv

Cryptographic Hash Functions

md5 743a3892f8ced95e1fab16fc98a9f3e3
sha1 962abb2e657972cb420517a5ab3f5aac259af5da
sha256 4ecff04a79358b0e1956078868670c6ad350a2b72775435ac3f24ce6c82cee0c
sha512 4c54eb42efade60f76a83fb7bfc05f5b607d21e3acd19487bc1d0baded5417fc82ab008a96da165c5027c267c802b615fb94b7c96e8eb7f90bd68a10feb8a4af
ripemd-160 f5c5ab95764b91ab5297bf338c0b7d2fc37fdcd1

21487 as geometric shapes

Circle

Radius = n
Diameter 42974
Circumference 135006.80269537
Area 1450445584.7577

Sphere

Radius = n
Volume 41554299039584
Surface area 5801782339.0307
Circumference 135006.80269537

Square

Length = n
Perimeter 85948
Area 461691169
Diagonal 30387.206814711

Cube

Length = n
Surface area 2770147014
Volume 9920358148303
Space diagonal 37216.575702232

Equilateral Triangle

Length = n
Perimeter 64461
Area 199918140.52847
Altitude 18608.287851116

Triangular Pyramid

Length = n
Surface area 199918140.52847
Volume 1169125419744
Height 10129.068938237