21745 (number)

21745 is an odd 5-digits composite number following 21744 and preceding 21746. In scientific notation, it is written as 2.1745 × 10^4. The sum of its digits is 19. It has a total of 2 prime factors and 4 positive divisors. There are 17392 positive integers (up to 21745) that are relatively prime to 21745.

Interesting facts

Basic properties

Name

Name twenty-one thousand seven hundred forty-five

Notation

Scientific notation 2.1745 × 10^4
Engineering notation 2.1745 × 10^3

Prime Factorization of 21745

Prime Factorization 5 × 4349

Composite number
ω Distinct Factors 2
Total number of distinct prime factors
Ω Total Factors 2
Total number of prime factors
rad Radical 21745
Product of the distinct prime numbers

The prime factorization of 21745 is 5 × 4349. Since it has a total of 2 prime factors.

Most popular turbo-numbers

1, 6, 83, 47, 539, 921, 8922, 6120, 73597, 2945, 757639, 73526, 3651533, 2721104, 14999708, 77597053, 4353767, 358283234, 7856604642, 2789889385

Basic calculations (n = 21745)

Multiplication

n×y
n×2 43490
n×3 65235
n×4 86980
n×5 108725

Division

n÷y
n÷2 10872.5
n÷3 7248.3333333333
n÷3 5436.25
n÷5 4349

Exponentiation

ny
n2 472845025
n3 10282015068625
n4 223582417667250625
n5 4.8617996721744E+21

Nth Root

y√n
2√n 147.46185947559
3√n 27.911711701961
4√n 12.143387479431
5√n 7.3700745759709

Divisors of 21745

1, 5, 4349, 21745

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 -21744
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 21745 can be divided by 4 positive divisors. The sum of these divisors (counting 21745) is 1, the average is 0.25.

Base conversion 21745

Base System Value
2 Binary 101010011110001
3 Ternary 1002211101
4 Quaternary 11103301
5 Quinary 1143440
6 Senary 244401
8 Octal 52361
10 Decimal 21745
12 Duodecimal 10701
16 Hexadecimal 54f1
20 Vigesimal 2e75
36 Base36 gs1

Cryptographic Hash Functions

md5 d8822633894235eaf124e0662e8efeb3
sha1 9d020897ce24d4f3dfcdea873decfcdb8e93479b
sha256 61eae731f0c3dfa5ffd18842c6a5c0bb747c44bdfd1d90778576fc0f97f800a9
sha512 741fc771205733939bc42d98bfddbc0c451b7af19e411857524de6f5d4a94bd9c4500b515584c105faf693ae1fa2dd076f800024afe70827f2b00d6c8dc645e9
ripemd-160 d9c2fdc20eafdf6bd2b279218021e61795295a6d

21745 as geometric shapes

Circle

Radius = n
Diameter 43490
Circumference 136627.86450462
Area 1485486456.8265

Sphere

Radius = n
Volume 43069204004922
Surface area 5941945827.3059
Circumference 136627.86450462

Square

Length = n
Perimeter 86980
Area 472845025
Diagonal 30752.073913803

Cube

Length = n
Surface area 2837070150
Volume 10282015068625
Space diagonal 37663.444810585

Equilateral Triangle

Length = n
Perimeter 65235
Area 204747901.85154
Altitude 18831.722405293

Triangular Pyramid

Length = n
Surface area 204747901.85154
Volume 1211747096547.8
Height 10250.691304601