81420105 (number)

81420105 is an odd 8-digits composite number following 81420104 and preceding 81420106. In scientific notation, it is written as 8.1420105 × 10^7. The sum of its digits is 21. It has a total of 4 prime factors and 16 positive divisors. There are 38787840 positive integers (up to 81420105) that are relatively prime to 81420105.

Interesting facts

Basic properties

Name

Name eighty-one million four hundred twenty thousand one hundred five

Notation

Scientific notation 8.1420105 × 10^7
Engineering notation 8.1420105 × 10^6

Prime Factorization of 81420105

Prime Factorization 39 × 5 × 31 × 13469

Composite number
ω Distinct Factors 4
Total number of distinct prime factors
Ω Total Factors 4
Total number of prime factors
rad Radical 81420105
Product of the distinct prime numbers

The prime factorization of 81420105 is 39 × 5 × 31 × 13469. Since it has a total of 4 prime factors.

Most popular turbo-numbers

2, 3, 83, 50, 999, 401, 1531, 2830, 57616, 87069, 700433, 159706, 5604743, 4390929, 63367915, 4841881, 114062460, 897108590, 8902371525, 722102058

Basic calculations (n = 81420105)

Multiplication

n×y
n×2 162840210
n×3 244260315
n×4 325680420
n×5 407100525

Division

n÷y
n÷2 40710052.5
n÷3 27140035
n÷3 20355026.25
n÷5 16284021

Exponentiation

ny
n2 6629233498211025
n3 5.3975288749386E+23
n4 4.3946736773803E+31
n5 3.5781479225304E+39

Nth Root

y√n
2√n 9023.308982851
3√n 433.42160167697
4√n 94.9910994928
5√n 38.207298521292

Divisors of 81420105

1, 5, 31, 39, 155, 195, 1209, 6045, 13469, 67345, 417539, 525291, 2087695, 2626455, 16284021, 81420105

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 -81420104
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 81420105 can be divided by 16 positive divisors. The sum of these divisors (counting 81420105) is 1, the average is 0.0625.

Base conversion 81420105

Base System Value
2 Binary 100110110100101111101001001
3 Ternary 12200012120101110
4 Quaternary 10312211331021
5 Quinary 131320420410
6 Senary 12025040533
8 Octal 466457511
10 Decimal 81420105
12 Duodecimal 23326149
16 Hexadecimal 4da5f49
20 Vigesimal 158ha55
36 Base36 1ch45l

Cryptographic Hash Functions

md5 c3696bcbc7e36b6d3399742e7f1a76e7
sha1 96400a0540062ed72ec3eb82f8cb265574dbcc6b
sha256 80652d37b557cee746091719b4e3ca39e08abbd19eeef117e5c4519a76b0abe1
sha512 8b10a8e8f7f72a510e7cb3e9c72165b938fbdcd24353e6968f15bccb9bfc6ade168a1e7e6aa88463d82a11ffd959f07e3fd11c78552f7d492eee8e51c4767fd3
ripemd-160 69df3f264244fd35d5ce9434b5e9685919566562

81420105 as geometric shapes

Circle

Radius = n
Diameter 162840210
Circumference 511577607.44502
Area 2.0826351256911E+16

Sphere

Radius = n
Volume 2.2609116081394E+24
Surface area 8.3305405027644E+16
Circumference 511577607.44502

Square

Length = n
Perimeter 325680420
Area 6629233498211025
Diagonal 115145416.74084

Cube

Length = n
Surface area 39775400989266150
Volume 5.3975288749386E+23
Space diagonal 141023758.61759

Equilateral Triangle

Length = n
Perimeter 244260315
Area 2.8705423085348E+15
Altitude 70511879.308796

Triangular Pyramid

Length = n
Surface area 2.8705423085348E+15
Volume 6.3610487818655E+22
Height 38381805.58028