123
Everything about the number 123 — its names, how to write it in other bases and numeral systems, and what makes it interesting mathematically.
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Names of 123
| Nominal | 123 |
| Cardinal | one hundred twenty-three |
| Ordinal | 123rd |
| This number as US currency | one hundred twenty-three dollars |
Properties (and some facts) of 123
| Is 123 an odd number? | 123 is an odd number |
| Is 123 an even number? | 123 is not an even number |
| Is 123 a palindrome? | 123 is not a palindrome |
| Is 123 a triangle number? | 123 is not a triangle number |
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123 in other bases
| Base 2 (Binary) | 1111011 |
| Base 3 (Ternary) | 11120 |
| Base 4 (Quaternary) | 1323 |
| Base 5 (Quinary) | 443 |
| Base 6 (Senary) | 323 |
| Base 8 (Octal) | 173 |
| Base 12 (Duodecimal) | A3 |
| Base 16 (Hexadecimal) | 7B |
| Base 20 (Vigesimal) | 63 |
Primes and factors tests for 123
| Is 123 a prime number? | 123 is not a prime number |
| Is 123 a perfect number? | 123 is not a perfect number |
| Is 123 a Mersenne prime? | 123 is not a Mersenne prime |
| Is 123 a Fermat prime? | 123 is not a Fermat prime |
| Is 123 a Fibonacci prime? | 123 is not a Fibonacci prime |
| Is 123 a partition prime? | 123 is not a partition prime |
| Is 123 a Pell prime? | 123 is not a Pell prime |
| Prime Factors | Prime factors of 123 |
123 in other numeral systems
| 123 in Roman numerals | CXXIII |
| 123 in Chinese numerals | 壹佰貳拾叄 |
| 123 in Babylonian numerals |   |
| 123 in Egyptian numerals | 𓍢𓎇𓏼 |
Roots and squares for 123
| Is 123 a square number? | 123 is not a square number |
| Is 123 a cube number? | 123 is not a cube number |
| Square root of 123 | 11.090536506409 |
| Cube root of 123 | 4.9731898332686 |
Recreational math for 123
| Number 123 reversed | 321 |
| Sum of the digits | 6 |
| Number of digits | 3 |
Arithmetic tables for 123
Other pages about 123
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