128124781 is an odd 9-digits composite number following 128124780
and preceding 128124782 . In scientific notation, it is written as 1.28124781 × 10^8.
The sum of its digits is 34. It has a total of 2 prime factors and 4 positive divisors.
There are 128037472 positive integers (up to 128124781) that are relatively prime to 128124781.
128124781 has 4 divisors, whose sum is 128212092
The reverse of 128124781 is 187421821
Previous prime number is 1493
Is Prime? no
Number parity odd
Number length 9
Sum of Digits 34
Digital Root 7
Name
one hundred twenty-eight million one hundred twenty-four thousand seven hundred eighty-one
Scientific notation
1.28124781 × 10^8
Engineering notation
1.28124781 × 10^6
Prime Factorization
1493 × 85817
Composite number
ω
Distinct Factors
2
Total number of distinct prime factors
Ω
Total Factors
2
Total number of prime factors
rad
Radical
128124781
Product of the distinct prime numbers
The prime factorization of 128124781 is 1493 × 85817.
Since it has a total of 2 prime factors.
8 , 5 , 29 , 46 , 164 , 32 , 5358 , 1941 , 83284 , 55815 , 1868 , 238042 , 6798474 , 7521165 , 586130 , 18374320 , 380797254 , 439932666 , 4509275775 , 5852688008
n×2
256249562
n×3
384374343
n×4
512499124
n×5
640623905
n÷2
64062390.5
n÷3
42708260.333333
n÷3
32031195.25
n÷5
25624956.2
n2
16415959506297961
n3
2.1032912166493E+24
n4
2.6948372651241E+32
n5
3.4527543442467E+40
2 √n
11319.221748866
3 √n
504.13213157184
4 √n
106.39183121305
5 √n
41.833733672456
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
-128124780
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 128124781 can be divided by 4 positive divisors.
The sum of these divisors (counting 128124781) is 1, the average is 0.25.
Base
System
Value
2
Binary
111101000110000011101101101
3
Ternary
22221002102011021
4
Quaternary
13220300131231
5
Quinary
230244443111
6
Senary
20414054141
8
Octal
750603555
10
Decimal
128124781
12
Duodecimal
36aaa351
16
Hexadecimal
7a3076d
20
Vigesimal
200fbj1
36
Base36
24a5pp
md5
d75132e6ab806d8ad4c4a77c9eacefa4
sha1
0ba4bdb3d9c8cb327fdd012e0191d78335a4cdf2
sha256
c4559536a87a1da18aa1af3204cd1f65401a09f9e90b5cf8dbd79fcf5fbb772c
sha512
019385a35143f77788972bd50c43f3ec63ce8a29ec9b400ac5ad74603dedc9f6fdd7985c4279a81331a353dcff38ff0664ad390c0c0082b00a45d9ff1f3bf9e6
ripemd-160
ccf33a14a0d74ef2829047ed79a3244abb623a0b
Diameter
256249562
Circumference
805031741.4648
Area
5.1572257786613E+16
Volume
8.8102456461138E+24
Surface area
2.0628903114645E+17
Circumference
805031741.4648
Perimeter
512499124
Area
16415959506297961
Diagonal
181195802.96628
Surface area
98495757037787766
Volume
2.1032912166493E+24
Space diagonal
221918630.40064
Perimeter
384374343
Area
7.1083189799753E+15
Altitude
110959315.20032
Surface area
7.1083189799753E+15
Volume
2.4787524701714E+23
Height
60398600.988761