21085 (number)

21085 is an odd 5-digits composite number following 21084 and preceding 21086. In scientific notation, it is written as 2.1085 × 10^4. The sum of its digits is 16. It has a total of 2 prime factors and 4 positive divisors. There are 16864 positive integers (up to 21085) that are relatively prime to 21085.

Interesting facts

Basic properties

Name

Name twenty-one thousand eighty-five

Notation

Scientific notation 2.1085 × 10^4
Engineering notation 2.1085 × 10^3

Prime Factorization of 21085

Prime Factorization 5 × 4217

Composite number
ω Distinct Factors 2
Total number of distinct prime factors
Ω Total Factors 2
Total number of prime factors
rad Radical 21085
Product of the distinct prime numbers

The prime factorization of 21085 is 5 × 4217. Since it has a total of 2 prime factors.

Most popular turbo-numbers

6, 10, 35, 72, 178, 312, 3241, 3788, 46384, 68030, 290957, 451397, 4848974, 8434052, 12232531, 85788163, 92979210, 924953008, 6874338219, 8569492474

Basic calculations (n = 21085)

Multiplication

n×y
n×2 42170
n×3 63255
n×4 84340
n×5 105425

Division

n÷y
n÷2 10542.5
n÷3 7028.3333333333
n÷3 5271.25
n÷5 4217

Exponentiation

ny
n2 444577225
n3 9373910789125
n4 197648908988700625
n5 4.1674272460268E+21

Nth Root

y√n
2√n 145.20674915444
3√n 27.626415234308
4√n 12.050176312172
5√n 7.3247822920246

Divisors of 21085

1, 5, 4217, 21085

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 -21084
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 21085 can be divided by 4 positive divisors. The sum of these divisors (counting 21085) is 1, the average is 0.25.

Base conversion 21085

Base System Value
2 Binary 101001001011101
3 Ternary 1001220221
4 Quaternary 11021131
5 Quinary 1133320
6 Senary 241341
8 Octal 51135
10 Decimal 21085
12 Duodecimal 10251
16 Hexadecimal 525d
20 Vigesimal 2ce5
36 Base36 g9p

Cryptographic Hash Functions

md5 6060d12ec4413d29a17e7584783c23be
sha1 c8de2b7e613611f606a3d8b8baa68660c64d996f
sha256 13124c098d9a61c4693efc4cf07d74f6b6e52bf1fe9e959f74ded1780be94ca2
sha512 dabf102e208d7f0d5001fdd840722f001c9301d039b6563797533f22798aae8c08a9e8688e0b66cf18c41e2e4e4a5b44686d432fcaaaba82f0ad22e57b77d5c7
ripemd-160 947b9123cf0158e9d5d8643371b8d938dfa872b0

21085 as geometric shapes

Circle

Radius = n
Diameter 42170
Circumference 132480.96220188
Area 1396680544.0133

Sphere

Radius = n
Volume 39265345694028
Surface area 5586722176.0533
Circumference 132480.96220188

Square

Length = n
Perimeter 84340
Area 444577225
Diagonal 29818.692962637

Cube

Length = n
Surface area 2667463350
Volume 9373910789125
Space diagonal 36520.29127759

Equilateral Triangle

Length = n
Perimeter 63255
Area 192507585.397
Altitude 18260.145638795

Triangular Pyramid

Length = n
Surface area 192507585.397
Volume 1104725980871.3
Height 9939.5643208789