21445 (number)

21445 is an odd 5-digits composite number following 21444 and preceding 21446. In scientific notation, it is written as 2.1445 × 10^4. The sum of its digits is 16. It has a total of 2 prime factors and 4 positive divisors. There are 17152 positive integers (up to 21445) that are relatively prime to 21445.

Interesting facts

Basic properties

Name

Name twenty-one thousand four hundred forty-five

Notation

Scientific notation 2.1445 × 10^4
Engineering notation 2.1445 × 10^3

Prime Factorization of 21445

Prime Factorization 5 × 4289

Composite number
ω Distinct Factors 2
Total number of distinct prime factors
Ω Total Factors 2
Total number of prime factors
rad Radical 21445
Product of the distinct prime numbers

The prime factorization of 21445 is 5 × 4289. Since it has a total of 2 prime factors.

Most popular turbo-numbers

10, 7, 33, 22, 697, 178, 8486, 2344, 28848, 80372, 883034, 653318, 5648675, 3600794, 51311139, 32859323, 677655839, 613715359, 2020799137, 6712954568

Basic calculations (n = 21445)

Multiplication

n×y
n×2 42890
n×3 64335
n×4 85780
n×5 107225

Division

n÷y
n÷2 10722.5
n÷3 7148.3333333333
n÷3 5361.25
n÷5 4289

Exponentiation

ny
n2 459888025
n3 9862298696125
n4 211496995538400625
n5 4.535553069321E+21

Nth Root

y√n
2√n 146.44111444536
3√n 27.782757625705
4√n 12.101285652581
5√n 7.3496254988573

Divisors of 21445

1, 5, 4289, 21445

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 -21444
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 21445 can be divided by 4 positive divisors. The sum of these divisors (counting 21445) is 1, the average is 0.25.

Base conversion 21445

Base System Value
2 Binary 101001111000101
3 Ternary 1002102021
4 Quaternary 11033011
5 Quinary 1141240
6 Senary 243141
8 Octal 51705
10 Decimal 21445
12 Duodecimal 104b1
16 Hexadecimal 53c5
20 Vigesimal 2dc5
36 Base36 gjp

Cryptographic Hash Functions

md5 4e5e71560b8b77d54f765f790ceafcfa
sha1 d46172b4c4ba911790a2bff83f9a0a0c62d0d928
sha256 666a1676052daf96f5b58d25fe8b0d3477b2e3ed2af0cf30857cff79d215c853
sha512 870baaa9762b618800385bf7a40bb2c6a3930116aca8deb3bef2b437114bac96de87d04c99f53a30edf283ede6a2a9b8c35799b96866e2d016a64783a41fdf6e
ripemd-160 24db9325a2251c380a1fff8769c9f8a3b433b822

21445 as geometric shapes

Circle

Radius = n
Diameter 42890
Circumference 134742.90891247
Area 1444780840.8139

Sphere

Radius = n
Volume 41311100175006
Surface area 5779123363.2557
Circumference 134742.90891247

Square

Length = n
Perimeter 85780
Area 459888025
Diagonal 30327.809845091

Cube

Length = n
Surface area 2759328150
Volume 9862298696125
Space diagonal 37143.829568315

Equilateral Triangle

Length = n
Perimeter 64335
Area 199137356.27313
Altitude 18571.914784157

Triangular Pyramid

Length = n
Surface area 199137356.27313
Volume 1162283047686.2
Height 10109.269948364