123 is an odd 3-digits composite number following 122
and preceding 124 . In scientific notation, it is written as 1.23 × 10^2.
The sum of its digits is 6. It has a total of 2 prime factors and 4 positive divisors.
There are 80 positive integers (up to 123) that are relatively prime to 123.
123 has 4 divisors, whose sum is 168
The reverse of 123 is 321
Previous prime number is 41
Is Prime? no
Number parity odd
Number length 3
Sum of Digits 6
Digital Root 6
Name
one hundred twenty-three
Scientific notation
1.23 × 10^2
Engineering notation
1.23 × 10^0
Prime Factorization
41 × 3
Composite number
ω
Distinct Factors
2
Total number of distinct prime factors
Ω
Total Factors
2
Total number of prime factors
rad
Radical
123
Product of the distinct prime numbers
The prime factorization of 123 is 41 × 3.
Since it has a total of 2 prime factors.
10 , 8 , 73 , 65 , 923 , 783 , 6996 , 5442 , 50050 , 10874 , 477354 , 515415 , 9473072 , 9993620 , 98815248 , 1008667 , 26461373 , 733800721 , 3522909993 , 1137971072
n×2
246
n×3
369
n×4
492
n×5
615
n÷2
61.5
n÷3
41
n÷3
30.75
n÷5
24.6
n2
15129
n3
1860867
n4
228886641
n5
28153056843
2 √n
11.090536506409
3 √n
4.9731898332686
4 √n
3.3302457126178
5 √n
2.618068601889
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
-122
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 123 can be divided by 4 positive divisors.
The sum of these divisors (counting 123) is 1, the average is 0.25.
Base
System
Value
2
Binary
1111011
3
Ternary
11120
4
Quaternary
1323
5
Quinary
443
6
Senary
323
8
Octal
173
10
Decimal
123
12
Duodecimal
a3
16
Hexadecimal
7b
20
Vigesimal
63
36
Base36
3f
md5
202cb962ac59075b964b07152d234b70
sha1
40bd001563085fc35165329ea1ff5c5ecbdbbeef
sha256
a665a45920422f9d417e4867efdc4fb8a04a1f3fff1fa07e998e86f7f7a27ae3
sha512
3c9909afec25354d551dae21590bb26e38d53f2173b8d3dc3eee4c047e7ab1c1eb8b85103e3be7ba613b31bb5c9c36214dc9f14a42fd7a2fdb84856bca5c44c2
ripemd-160
e3431a8e0adbf96fd140103dc6f63a3f8fa343ab
Diameter
246
Circumference
772.83179278309
Area
47529.15525616
Volume
7794781.4620102
Surface area
190116.62102464
Circumference
772.83179278309
Perimeter
492
Area
15129
Diagonal
173.94826817189
Surface area
90774
Volume
1860867
Space diagonal
213.04224933097
Perimeter
369
Area
6551.0491669274
Altitude
106.52112466549
Surface area
6551.0491669274
Volume
219305.27909771
Height
57.982756057297