5
Everything about the number 5 — its names, how to write it in other bases and numeral systems, and what makes it interesting mathematically.
Advertisement
Names of 5
| Nominal | 5 |
| Cardinal | five |
| Ordinal | 5th |
| This number as US currency | five dollars |
Properties (and some facts) of 5
| Is 5 an odd number? | 5 is an odd number |
| Is 5 an even number? | 5 is not an even number |
| Is 5 a palindrome? | 5 is a palindrome |
| Is 5 a triangle number? | 5 is not a triangle number |
| Factorial (5!) of the number 5 | 120 |
Advertisement
5 in other bases
| Base 2 (Binary) | 101 |
| Base 3 (Ternary) | 12 |
| Base 4 (Quaternary) | 11 |
| Base 5 (Quinary) | 10 |
| Base 6 (Senary) | 5 |
| Base 8 (Octal) | 5 |
| Base 12 (Duodecimal) | 5 |
| Base 16 (Hexadecimal) | 5 |
| Base 20 (Vigesimal) | 5 |
Primes and factors tests for 5
| Is 5 a prime number? | 5 is a prime number |
| Is 5 a perfect number? | 5 is not a perfect number |
| Is 5 a Mersenne prime? | 5 is not a Mersenne prime |
| Is 5 a Fermat prime? | 5 is a Fermat prime |
| Is 5 a Fibonacci prime? | 5 is a Fibonacci prime |
| Is 5 a partition prime? | 5 is a partition prime |
| Is 5 a Pell prime? | 5 is a Pell prime |
| Prime Factors | Prime factors of 5 |
5 in other numeral systems
| 5 in Roman numerals | V |
| 5 in Chinese numerals | 伍 |
| 5 in Babylonian numerals |  |
| 5 in Egyptian numerals | 𓏾 |
Roots and squares for 5
| Is 5 a square number? | 5 is not a square number |
| Is 5 a cube number? | 5 is not a cube number |
| Square root of 5 | 2.2360679774998 |
| Cube root of 5 | 1.7099759466767 |
Recreational math for 5
| Number 5 reversed | 5 |
| Sum of the digits | 5 |
| Number of digits | 1 |
Arithmetic tables for 5
Other pages about 5
Advertisement