25 (number)

← 24 25 26 →
← 20 21 22 23 24 25 26 27 28 29 → List of numbers Integers ← 0 10 20 30 40 50 60 70 80 90 →
Cardinal	twenty-five
Ordinal	25th (twenty-fifth)
Factorization	52
Divisors	1, 5, 25
Greek numeral	ΚΕ´
Roman numeral	XXV, xxv
Binary	110012
Ternary	2213
Senary	416
Octal	318
Duodecimal	2112
Hexadecimal	1916

25 (twenty-five) is the natural number following 24 and preceding 26.

In mathematics

25 is a square.

It is a square number, being 5². 25 is also the smallest square that is also a sum of two nonzero squares: $25=3^{2}+4^{2}$. In other words, the numbers 3, 4 and 5 form the smallest Pythagorean triple.

In religion

• In Ezekiel's vision of a new temple: The number twenty-five is of cardinal importance in Ezekiel's Temple Vision (in the Bible, Ezekiel chapters 40–48).

In sports

• In baseball, the number 25 is typically reserved for the best slugger on the team. Examples include Mark McGwire, Barry Bonds, Jim Thome, and Mark Teixeira.

In other fields

Twenty-five is:

• The number of years of marriage marked in a silver wedding anniversary.