45

The numbers with a 5 subscript use Base 5 Quinary notation.

For more familiar numbers: See Four in Base 10 Decimal

Nearby Numbers

Positive, nonzero integers within three units

2
25
Two in Base 5 Quinary
3
35
Three in Base 5 Quinary
5
105
Five in Base 5 Quinary
6
115
Six in Base 5 Quinary
7
125
Seven in Base 5 Quinary

Scientific Notation

Scientific notation expresses a quantity as the product of its significand with 10 raised to an integer exponent.

Reciprocal

A number multiplied with its reciprocal is one.

0.111111111111111111111115

The reciprocal of 4 in Base 5 Quinary.

Palindrome?

A numerical palindrome has the same value when all of its digits are reversed.

The number 45 is a palindrome.

Not A Prime Number

A prime number is a positive integer that is divisible only by itself and one.

Four is a composite number with 3 total factors (including 1 and itself).   See primes in Base 5 Quinary

A Composite

Composites have more than just these two factors.

Four is a composite number with 3 total factors (including 1 and itself).

Prime Factors

The prime factors of a positive integer are the integers that divide it exactly and are also prime.

The number four has the following 1 prime factor:

2
25
Two in Base 5 Quinary

Prime Factorization

The prime factorization of a positive integer is the unique list of prime factors together with their multiplicities

Base Conversions

The number four in 35 different bases