21105 (number)

21105 is an odd 5-digits composite number following 21104 and preceding 21106. In scientific notation, it is written as 2.1105 × 10^4. The sum of its digits is 9. It has a total of 4 prime factors and 16 positive divisors. There are 9504 positive integers (up to 21105) that are relatively prime to 21105.

Interesting facts

Basic properties

Name

Name twenty-one thousand one hundred five

Notation

Scientific notation 2.1105 × 10^4
Engineering notation 2.1105 × 10^3

Prime Factorization of 21105

Prime Factorization 9 × 5 × 7 × 67

Composite number
ω Distinct Factors 4
Total number of distinct prime factors
Ω Total Factors 4
Total number of prime factors
rad Radical 21105
Product of the distinct prime numbers

The prime factorization of 21105 is 9 × 5 × 7 × 67. Since it has a total of 4 prime factors.

Most popular turbo-numbers

6, 7, 26, 61, 239, 782, 8351, 7148, 18020, 12418, 889692, 57345, 559309, 7994667, 57215757, 875482, 956193537, 922420853, 5767235263, 3391803716

Basic calculations (n = 21105)

Multiplication

n×y
n×2 42210
n×3 63315
n×4 84420
n×5 105525

Division

n÷y
n÷2 10552.5
n÷3 7035
n÷3 5276.25
n÷5 4221

Exponentiation

ny
n2 445421025
n3 9400610732625
n4 198399889512050625
n5 4.1872296681518E+21

Nth Root

y√n
2√n 145.27560015364
3√n 27.635147408808
4√n 12.053032819736
5√n 7.3261713372659

Divisors of 21105

1, 5, 7, 9, 35, 45, 63, 67, 315, 335, 469, 603, 2345, 3015, 4221, 21105

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 -21104
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 21105 can be divided by 16 positive divisors. The sum of these divisors (counting 21105) is 1, the average is 0.0625.

Base conversion 21105

Base System Value
2 Binary 101001001110001
3 Ternary 1001221200
4 Quaternary 11021301
5 Quinary 1133410
6 Senary 241413
8 Octal 51161
10 Decimal 21105
12 Duodecimal 10269
16 Hexadecimal 5271
20 Vigesimal 2cf5
36 Base36 ga9

Cryptographic Hash Functions

md5 28fd3872c62aad371e8b21061f1a35bd
sha1 bb6f62bdd50280a59a9e73b99143344fa246cd90
sha256 2e9cbd6e2552dbeab8aa6e4dba5d788a280d1773847edec2f4c3cbdc75ee8491
sha512 a201717655d17b671a432c22fa408ca38e46e41fa02732f07bf0cea3a1fa68dce2073279f726bfcf5c5cb0c21a05e16919a6b17fe05cb50a52327223d4821826
ripemd-160 af940cdb3d30214b6c90e6a5691752396300a02b

21105 as geometric shapes

Circle

Radius = n
Diameter 42210
Circumference 132606.62590803
Area 1399331419.8944

Sphere

Radius = n
Volume 39377186155829
Surface area 5597325679.5777
Circumference 132606.62590803

Square

Length = n
Perimeter 84420
Area 445421025
Diagonal 29846.977233884

Cube

Length = n
Surface area 2672526150
Volume 9400610732625
Space diagonal 36554.932293741

Equilateral Triangle

Length = n
Perimeter 63315
Area 192872961.51485
Altitude 18277.466146871

Triangular Pyramid

Length = n
Surface area 192872961.51485
Volume 1107872599389
Height 9948.9924112947