129
Everything about the number 129 — its names, how to write it in other bases and numeral systems, and what makes it interesting mathematically.
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Names of 129
| Nominal | 129 |
| Cardinal | one hundred twenty-nine |
| Ordinal | 129th |
| This number as US currency | one hundred twenty-nine dollars |
Properties (and some facts) of 129
| Is 129 an odd number? | 129 is an odd number |
| Is 129 an even number? | 129 is not an even number |
| Is 129 a palindrome? | 129 is not a palindrome |
| Is 129 a triangle number? | 129 is not a triangle number |
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129 in other bases
| Base 2 (Binary) | 10000001 |
| Base 3 (Ternary) | 11210 |
| Base 4 (Quaternary) | 2001 |
| Base 5 (Quinary) | 1004 |
| Base 6 (Senary) | 333 |
| Base 8 (Octal) | 201 |
| Base 12 (Duodecimal) | A9 |
| Base 16 (Hexadecimal) | 81 |
| Base 20 (Vigesimal) | 69 |
Primes and factors tests for 129
| Is 129 a prime number? | 129 is not a prime number |
| Is 129 a perfect number? | 129 is not a perfect number |
| Is 129 a Mersenne prime? | 129 is not a Mersenne prime |
| Is 129 a Fermat prime? | 129 is not a Fermat prime |
| Is 129 a Fibonacci prime? | 129 is not a Fibonacci prime |
| Is 129 a partition prime? | 129 is not a partition prime |
| Is 129 a Pell prime? | 129 is not a Pell prime |
| Prime Factors | Prime factors of 129 |
129 in other numeral systems
| 129 in Roman numerals | CXXIX |
| 129 in Chinese numerals | 壹佰貳拾玖 |
| 129 in Babylonian numerals |   |
| 129 in Egyptian numerals | 𓍢𓎇𓐂 |
Roots and squares for 129
| Is 129 a square number? | 129 is not a square number |
| Is 129 a cube number? | 129 is not a cube number |
| Square root of 129 | 11.357816691601 |
| Cube root of 129 | 5.0527743472086 |
Recreational math for 129
| Number 129 reversed | 921 |
| Sum of the digits | 12 |
| Number of digits | 3 |
Arithmetic tables for 129
Other pages about 129
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