Max	9223372036854775807
25835	Positive integer
0b10001100	Binary number
01771452	Octal number
0x129abf	Hex number
5.012 * 10^7	Scientific notation
2^4 * 5	Factorized form
*	Random number

81865 (number)

81865 is an odd 5-digits composite number following 81864 and preceding 81866. In scientific notation, it is written as 8.1865 × 10^4. The sum of its digits is 28. It has a total of 3 prime factors and 8 positive divisors. There are 56112 positive integers (up to 81865) that are relatively prime to 81865.

Interesting facts

81865 has 8 divisors, whose sum is 112320
The reverse of 81865 is 56818
Previous prime number is 7

Basic properties

Is Prime? no
Number parity odd
Number length 5
Sum of Digits 28
Digital Root 1

Name

Name	eighty-one thousand eight hundred sixty-five

Notation

Scientific notation	8.1865 × 10^4
Engineering notation	8.1865 × 10^3

Prime Factorization of 81865

Prime Factorization 5 × 7 × 2339

Composite number

ω	Distinct Factors	3	Total number of distinct prime factors
Ω	Total Factors	3	Total number of prime factors
rad	Radical	81865	Product of the distinct prime numbers

The prime factorization of 81865 is 5 × 7 × 2339. Since it has a total of 3 prime factors.

Most popular turbo-numbers

9, 7, 82, 72, 897, 656, 2581, 599, 67307, 96236, 574044, 313444, 8475998, 9150829, 3474525, 48640439, 956718945, 414496886, 8853745213, 7416478044

Basic calculations (n = 81865)

Multiplication

n×y

n×2	163730
n×3	245595
n×4	327460
n×5	409325

Division

n÷y

n÷2	40932.5
n÷3	27288.333333333
n÷3	20466.25
n÷5	16373

Exponentiation

n^y

n²	6701878225
n³	548649260889625
n⁴	4.4915171742729E+19
n⁵	3.6769805347185E+24

Nth Root

^y√n

²√n	286.12060394176
³√n	43.420960095174
⁴√n	16.915099879745
⁵√n	9.6077048548156

Divisors of 81865

1, 5, 7, 35, 2339, 11695, 16373, 81865

8 divisors

τ	Total Divisors	8	Total number of the positive divisors of n
σ	Sum of Divisors	1	Sum of all the positive divisors of n
s	Aliquot Sum	-81864	Sum of the proper positive divisors of n
A	Arithmetic Mean	0.125	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	8	Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 81865 can be divided by 8 positive divisors. The sum of these divisors (counting 81865) is 1, the average is 0.125.

Base conversion 81865

Base	System	Value
2	Binary	10011111111001001
3	Ternary	11011022001
4	Quaternary	103333021
5	Quinary	10104430
6	Senary	1431001
8	Octal	237711
10	Decimal	81865
12	Duodecimal	3b461
16	Hexadecimal	13fc9
20	Vigesimal	a4d5
36	Base36	1r61

Cryptographic Hash Functions

md5	1e5791a4b324b65caffe87763f55e2e7
sha1	11ec005ae3ce2b20bc373b1fb6a238197049f8ab
sha256	fcbcf8392d10423e442a13a7e8e1d7e9f53ba82b705b06bdf3087edbc231a9a3
sha512	9782fbddcf51ff93b941e59c17bfadbfa3dc8be6852faf5b8947f3797b2b52d880e42304d9febe2f9d275e776df7c47f820f9b8747b4e6a777011daab7596077
ripemd-160	b19019fd33c51b1719fbae9156fd90d061f6bf89

81865 as geometric shapes

Circle

Radius = n

Diameter	163730
Circumference	514372.96517226
Area	21054571396.913

Sphere

Radius = n

Volume	2.2981766498778E+15
Surface area	84218285587.654
Circumference	514372.96517226

Square

Length = n

Perimeter	327460
Area	6701878225
Diagonal	115774.59328367

Cube

Length = n

Surface area	40211269350
Volume	548649260889625
Space diagonal	141794.33936163

Equilateral Triangle

Length = n

Perimeter	245595
Area	2901998397.9599
Altitude	70897.169680813

Triangular Pyramid

Length = n

Surface area	2901998397.9599
Volume	64658935478007
Height	38591.531094558