21305 (number)

21305 is an odd 5-digits composite number following 21304 and preceding 21306. In scientific notation, it is written as 2.1305 × 10^4. The sum of its digits is 11. It has a total of 2 prime factors and 4 positive divisors. There are 17040 positive integers (up to 21305) that are relatively prime to 21305.

Interesting facts

Basic properties

Name

Name twenty-one thousand three hundred five

Notation

Scientific notation 2.1305 × 10^4
Engineering notation 2.1305 × 10^3

Prime Factorization of 21305

Prime Factorization 5 × 4261

Composite number
ω Distinct Factors 2
Total number of distinct prime factors
Ω Total Factors 2
Total number of prime factors
rad Radical 21305
Product of the distinct prime numbers

The prime factorization of 21305 is 5 × 4261. Since it has a total of 2 prime factors.

Most popular turbo-numbers

2, 9, 78, 57, 774, 484, 4755, 2569, 39154, 41434, 688209, 853561, 5696809, 2848129, 25916551, 44507470, 451013831, 776870170, 2737332643, 7704118558

Basic calculations (n = 21305)

Multiplication

n×y
n×2 42610
n×3 63915
n×4 85220
n×5 106525

Division

n÷y
n÷2 10652.5
n÷3 7101.6666666667
n÷3 5326.25
n÷5 4261

Exponentiation

ny
n2 453903025
n3 9670403947625
n4 206027956104150625
n5 4.3894256047989E+21

Nth Root

y√n
2√n 145.96232390586
3√n 27.722167261751
4√n 12.081486825133
5√n 7.3400041879144

Divisors of 21305

1, 5, 4261, 21305

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 -21304
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 21305 can be divided by 4 positive divisors. The sum of these divisors (counting 21305) is 1, the average is 0.25.

Base conversion 21305

Base System Value
2 Binary 101001100111001
3 Ternary 1002020002
4 Quaternary 11030321
5 Quinary 1140210
6 Senary 242345
8 Octal 51471
10 Decimal 21305
12 Duodecimal 103b5
16 Hexadecimal 5339
20 Vigesimal 2d55
36 Base36 gft

Cryptographic Hash Functions

md5 3a909674b845c826ecccfbe8a42247f6
sha1 6b28b4c108558abae77e73790992acf780147061
sha256 56d6d3dc6c7054ba6b59120448bfeb65ee189ff49249e4023ba0782ab4ac461e
sha512 6996b1d06c49cb87fba6618718247b7b4bc6c7d6569dc1ca32f8ed3b538b8bb7123e3d876b4cb9af8ff7ab73f532e63b246cf17f40d760cf62be2516ad11078f
ripemd-160 451e9a67d0e73c341817407e89da423f6308cfaa

21305 as geometric shapes

Circle

Radius = n
Diameter 42610
Circumference 133863.26296946
Area 1425978408.7822

Sphere

Radius = n
Volume 40507293332139
Surface area 5703913635.1287
Circumference 133863.26296946

Square

Length = n
Perimeter 85220
Area 453903025
Diagonal 30129.819946359

Cube

Length = n
Surface area 2723418150
Volume 9670403947625
Space diagonal 36901.342455255

Equilateral Triangle

Length = n
Perimeter 63915
Area 196545775.2523
Altitude 18450.671227627

Triangular Pyramid

Length = n
Surface area 196545775.2523
Volume 1139668034696.5
Height 10043.273315453