129956721 is an odd 9-digits composite number following 129956720
and preceding 129956722 . In scientific notation, it is written as 1.29956721 × 10^8.
The sum of its digits is 42. It has a total of 3 prime factors and 8 positive divisors.
There are 81541440 positive integers (up to 129956721) that are relatively prime to 129956721.
129956721 has 8 divisors, whose sum is 183468384
The reverse of 129956721 is 127659921
Previous prime number is 17
Is Prime? no
Number parity odd
Number length 9
Sum of Digits 42
Digital Root 6
Name
one hundred twenty-nine million nine hundred fifty-six thousand seven hundred twenty-one
Scientific notation
1.29956721 × 10^8
Engineering notation
1.29956721 × 10^6
Prime Factorization
3 × 17 × 2548171
Composite number
ω
Distinct Factors
3
Total number of distinct prime factors
Ω
Total Factors
3
Total number of prime factors
rad
Radical
129956721
Product of the distinct prime numbers
The prime factorization of 129956721 is 3 × 17 × 2548171.
Since it has a total of 3 prime factors.
2 , 10 , 60 , 62 , 261 , 780 , 7153 , 68 , 23495 , 64016 , 619785 , 411312 , 3508144 , 1103269 , 96952141 , 93488350 , 755120770 , 876654360 , 8447676127 , 1770573603
n×2
259913442
n×3
389870163
n×4
519826884
n×5
649783605
n÷2
64978360.5
n÷3
43318907
n÷3
32489180.25
n÷5
25991344.2
n2
16888749333071841
n3
2.194806485117E+24
n4
2.8522985403533E+32
n5
3.7067536561741E+40
2 √n
11399.856183303
3 √n
506.52347961177
4 √n
106.7701090348
5 √n
41.952683820657
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
-129956720
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 129956721 can be divided by 8 positive divisors.
The sum of these divisors (counting 129956721) is 1, the average is 0.125.
Base
System
Value
2
Binary
111101111101111101101110001
3
Ternary
100001112111002220
4
Quaternary
13233233231301
5
Quinary
231232103341
6
Senary
20521231253
8
Octal
757575561
10
Decimal
129956721
12
Duodecimal
37632529
16
Hexadecimal
7befb71
20
Vigesimal
20c4bg1
36
Base36
25df8x
md5
b29d1a0be888c29ceb1eaa41b4ad7f73
sha1
e1d65517e5bdb49fdc94dedc037290250fdff7b8
sha256
7b74d11b1e412c5496e4960841997c541f7a25ea9aa5f343a5d6d3597fcb9fd0
sha512
21639874959128daed513ff3dc2f73b9c923f573805f769ad19b118a6a52cf3b4baea7725d6e5e1b30c7bc84ec65df056a4d62ff9cdf9426dcd582e910f4dba7
ripemd-160
59a530c2f398485a4bc4780e929e34c2545ce5dc
Diameter
259913442
Circumference
816542159.95644
Area
5.3057570833098E+16
Volume
9.1935839062595E+24
Surface area
2.1223028333239E+17
Circumference
816542159.95644
Perimeter
519826884
Area
16888749333071841
Diagonal
183786557.35974
Surface area
101332495998431046
Volume
2.194806485117E+24
Space diagonal
225091643.55705
Perimeter
389870163
Area
7.3130429802939E+15
Altitude
112545821.77853
Surface area
7.3130429802939E+15
Volume
2.586604248364E+23
Height
61262185.786579