12
Everything about the number 12 — its names, how to write it in other bases and numeral systems, and what makes it interesting mathematically.
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Names of 12
| Nominal | 12 |
| Cardinal | twelve |
| Ordinal | 12th |
| This number as US currency | twelve dollars |
Properties (and some facts) of 12
| Is 12 an odd number? | 12 is not an odd number |
| Is 12 an even number? | 12 is an even number |
| Is 12 a palindrome? | 12 is not a palindrome |
| Is 12 a triangle number? | 12 is not a triangle number |
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12 in other bases
| Base 2 (Binary) | 1100 |
| Base 3 (Ternary) | 110 |
| Base 4 (Quaternary) | 30 |
| Base 5 (Quinary) | 22 |
| Base 6 (Senary) | 20 |
| Base 8 (Octal) | 14 |
| Base 12 (Duodecimal) | 10 |
| Base 16 (Hexadecimal) | C |
| Base 20 (Vigesimal) | C |
Primes and factors tests for 12
| Is 12 a prime number? | 12 is not a prime number |
| Is 12 a perfect number? | 12 is not a perfect number |
| Is 12 a Mersenne prime? | 12 is not a Mersenne prime |
| Is 12 a Fermat prime? | 12 is not a Fermat prime |
| Is 12 a Fibonacci prime? | 12 is not a Fibonacci prime |
| Is 12 a partition prime? | 12 is not a partition prime |
| Is 12 a Pell prime? | 12 is not a Pell prime |
| Prime Factors | Prime factors of 12 |
12 in other numeral systems
| 12 in Roman numerals | XII |
| 12 in Chinese numerals | 壹拾貳 |
| 12 in Babylonian numerals |  |
| 12 in Egyptian numerals | 𓎆𓏻 |
Roots and squares for 12
| Is 12 a square number? | 12 is not a square number |
| Is 12 a cube number? | 12 is not a cube number |
| Square root of 12 | 3.4641016151378 |
| Cube root of 12 | 2.2894284851067 |
Recreational math for 12
| Number 12 reversed | 21 |
| Sum of the digits | 3 |
| Number of digits | 2 |
Arithmetic tables for 12
Other pages about 12
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