21420565 is an odd 8-digits composite number following 21420564
and preceding 21420566 . In scientific notation, it is written as 2.1420565 × 10^7.
The sum of its digits is 25. It has a total of 2 prime factors and 4 positive divisors.
There are 17136448 positive integers (up to 21420565) that are relatively prime to 21420565.
21420565 has 4 divisors, whose sum is 25704684
The reverse of 21420565 is 56502412
Previous prime number is 5
Is Prime? no
Number parity odd
Number length 8
Sum of Digits 25
Digital Root 7
Name
twenty-one million four hundred twenty thousand five hundred sixty-five
Scientific notation
2.1420565 × 10^7
Engineering notation
2.1420565 × 10^6
Prime Factorization
5 × 4284113
Composite number
ω
Distinct Factors
2
Total number of distinct prime factors
Ω
Total Factors
2
Total number of prime factors
rad
Radical
21420565
Product of the distinct prime numbers
The prime factorization of 21420565 is 5 × 4284113.
Since it has a total of 2 prime factors.
3 , 10 , 46 , 76 , 822 , 903 , 7953 , 7330 , 64472 , 86466 , 494451 , 884446 , 5694965 , 724052 , 62563169 , 70885715 , 125897367 , 776494840 , 1055474829 , 8984072920
n×2
42841130
n×3
64261695
n×4
85682260
n×5
107102825
n÷2
10710282.5
n÷3
7140188.3333333
n÷3
5355141.25
n÷5
4284113
n2
458840604919225
n3
9.8286250023116E+21
n4
2.1053470072264E+29
n5
4.5097722415849E+36
2 √n
4628.2356249439
3 √n
277.7220147917
4 √n
68.031137172209
5 √n
29.252715295089
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
-21420564
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 21420565 can be divided by 4 positive divisors.
The sum of these divisors (counting 21420565) is 1, the average is 0.25.
Base
System
Value
2
Binary
1010001101101101000010101
3
Ternary
1111022021111021
4
Quaternary
1101231220111
5
Quinary
20440424230
6
Senary
2043041141
8
Octal
121555025
10
Decimal
21420565
12
Duodecimal
72101b1
16
Hexadecimal
146da15
20
Vigesimal
6dhb85
36
Base36
cr47p
md5
88ab872404795a45dc6a71fc762c6a68
sha1
2f8a1152adcd74179e73b822684bb8e42042cd7b
sha256
cb85efdeb427ab55769fb9efa1aa572572b19af2705251515aa504074b58e454
sha512
7cec0d3239181d2dce1fd5b3e46b6a046fefb83be0bf3cee9c7dbd34f56dac603e876f774d9494f4060bf061ac32e182db7eb37eb084faf4a91282deec74a0af
ripemd-160
aca4184c85e425be0b01eb951515d90c15b58cec
Diameter
42841130
Circumference
134589379.27949
Area
1.4414902735829E+15
Volume
4.1170048136201E+22
Surface area
5.7659610943317E+15
Circumference
134589379.27949
Perimeter
85682260
Area
458840604919225
Diagonal
30293253.536694
Surface area
2753043629515350
Volume
9.8286250023116E+21
Space diagonal
37101506.906832
Perimeter
64261695
Area
1.9868381007393E+14
Altitude
18550753.453416
Surface area
1.9868381007393E+14
Volume
1.1583145648124E+21
Height
10097751.178898