Names of 123
| Nominal | 123 |
| Cardinal | one hundred twenty-three |
| Ordinal | 123rd |
| This number as US currency | one hundred twenty-three dollars |
| 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 number |
| Is 123 a triangle number? | 123 is NOT a triangle number |
123 in other Bases
| Base 2 (Binary) | 11110112 |
| Base 3 (Ternary) | 111203 |
| Base 4 (Quaternary) | 13234 |
| Base 5 (Quinary) | 4435 |
| Base 6 (Senary) | 3236 |
| Base 8 (Octal) | 1738 |
| Base 12 (Duodecimal) | A312 |
| Base 16 (Hexadecimal) | 7B16 |
| Base 20 (Vigesimal) | 6320 |
Primes and Factors tests for 123
| Is 123 a Prime Number? | 123 is NOT a prime |
| 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 |
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123 in other Numerals
| 123 in Roman Numeral | CXXIII |
| 123 in Chinese Numeral | 壹佰貳拾叄 |
| 123 in Egyptian Numeral | 𓍢𓎇𓏼 |
| 123 in Babylonian Numeral |   |
Roots and stuff 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 the number 123 | 11.090536506409 |
| Cube root of the number 123 | 4.9731898332686 |
Recreational math for 123
| Number 123 reversed | 321 |
| Sum of the digits | 6 |
| No of digits | 3 |