Names of 21145
| Nominal | 21145 |
| Cardinal | twenty-one thousand one hundred forty-five |
| Ordinal | 21,145th |
| This number as US currency | twenty-one thousand one hundred forty-five dollars |
| Is 21145 an odd number? | 21145 is an odd number |
| Is 21145 an even number? | 21145 is NOT an even number |
| Is 21145 a palindrome? | 21145 is NOT a palindrome number |
| Is 21145 a triangle number? | 21145 is NOT a triangle number |
21145 in other Bases
| Base 2 (Binary) | 1010010100110012 |
| Base 3 (Ternary) | 10020000113 |
| Base 4 (Quaternary) | 110221214 |
| Base 5 (Quinary) | 11340405 |
| Base 6 (Senary) | 2415216 |
| Base 8 (Octal) | 512318 |
| Base 12 (Duodecimal) | 102A112 |
| Base 16 (Hexadecimal) | 529916 |
| Base 20 (Vigesimal) | 2CH520 |
Primes and Factors tests for 21145
| Is 21145 a Prime Number? | 21145 is NOT a prime |
| Is 21145 a perfect number? | 21145 is NOT a perfect number |
| Is 21145 a Mersenne Prime? | 21145 is NOT a Mersenne prime |
| Is 21145 a Fermat Prime? | 21145 is NOT a Fermat prime |
| Is 21145 a Fibonacci Prime? | 21145 is NOT a Fibonacci prime |
| Is 21145 a Partition Prime? | 21145 is NOT a Partition prime |
| Is 21145 a Pell Prime? | 21145 is NOT a Pell prime |
| Prime Factors | Prime factors of 21145 |
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21145 in other Numerals
| 21145 in Roman Numeral | XXMCXLV |
| 21145 in Chinese Numeral | 貳萬壹仟壹佰肆拾伍 |
| 21145 in Egyptian Numeral | 𓂮𓆼𓍢𓎉𓏾 |
| 21145 in Babylonian Numeral |    |
Roots and stuff for 21145
| Is 21145 a square number? | 21145 is NOT a square number |
| Is 21145 a cube number? | 21145 is NOT a cube number |
| Square root of the number 21145 | 145.41320435229 |
| Cube root of the number 21145 | 27.652595221767 |
Recreational math for 21145
| Number 21145 reversed | 54112 |
| Sum of the digits | 13 |
| No of digits | 5 |