129128821 is an odd 9-digits composite number following 129128820
and preceding 129128822 . In scientific notation, it is written as 1.29128821 × 10^8.
The sum of its digits is 34. It has a total of 2 prime factors and 4 positive divisors.
There are 121532992 positive integers (up to 129128821) that are relatively prime to 129128821.
129128821 has 4 divisors, whose sum is 136724652
The reverse of 129128821 is 128821921
Previous prime number is 17
Is Prime? no Number parity odd Number length 9 Sum of Digits 34 Digital Root 7
Name
one hundred twenty-nine million one hundred twenty-eight thousand eight hundred twenty-one
Scientific notation
1.29128821 × 10^8
Engineering notation
1.29128821 × 10^6
Prime Factorization
17 × 7595813
Composite number
ω Distinct Factors
2 Total number of distinct prime factors
Ω Total Factors
2 Total number of prime factors
rad Radical
129128821 Product of the distinct prime numbers
The prime factorization of 129128821 is 17 × 7595813.
Since it has a total of 2 prime factors.
8 , 4 , 40 , 50 , 124 , 189 , 7533 , 6376 , 36719 , 15289 , 346249 , 204581 , 2058598 , 6759461 , 96853173 , 774026 , 86177933 , 394353870 , 6178790917 , 6691873842
n×2
258257642
n×3
387386463
n×4
516515284
n×5
645644105
n÷2
64564410.5
n÷3
43042940.333333
n÷3
32282205.25
n÷5
25825764.2
n2
16674252412850041
n3
2.1531265551277E+24
n4
2.7803069352744E+32
n5
3.590177565701E+40
2 √n11363.486304827
3 √n505.44557087009
4 √n106.59965433728
5 √n41.899094482127
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
-129128820 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 129128821 can be divided by 4 positive divisors.
The sum of these divisors (counting 129128821) is 1, the average is 0.25.
Base
System
Value
2
Binary
111101100100101100101110101
3
Ternary
22222222102102221
4
Quaternary
13230211211311
5
Quinary
231024110241
6
Senary
20451402341
8
Octal
754454565
10
Decimal
129128821
12
Duodecimal
372b33b1
16
Hexadecimal
7b25975
20
Vigesimal
2071211
36
Base36
24vofp
md5
6048aed539fba55e96a105458a54a291
sha1
5689992237a320b61816ab0dec3e72e163598661
sha256
ac6055a821e1d98a7abab7d6ee4dcee87df00d42b04dc3b34f94ca0e3d3d9a73
sha512
cf8c87b5034097ea5437dfdd129b8afa936f22ea82c842945f325040815ed76789147058b42cb31890f7d862961a936b5d09a468a3d08597767701e44959d675
ripemd-160
5d0d134a498fc0403824e19351bf4e12d9878989
Diameter
258257642
Circumference
811340310.84062
Area
5.2383708884312E+16
Volume
9.0189954237845E+24
Surface area
2.0953483553725E+17
Circumference
811340310.84062
Perimeter
516515284
Area
16674252412850041
Diagonal
182615729.95145
Surface area
100045514477100246
Volume
2.1531265551277E+24
Space diagonal
223657678.69347
Perimeter
387386463
Area
7.2201630893211E+15
Altitude
111828839.34673
Surface area
7.2201630893211E+15
Volume
2.5374839798061E+23
Height
60871909.983816