Everything about the number 21442 — its names, how to write it in other bases and numeral systems, and what makes it interesting mathematically.
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| Nominal | 21442 |
| Cardinal | twenty-one thousand four hundred forty-two |
| Ordinal | 21,442nd |
| This number as US currency | twenty-one thousand four hundred forty-two dollars |
| Is 21442 an odd number? | 21442 is not an odd number |
| Is 21442 an even number? | 21442 is an even number |
| Is 21442 a palindrome? | 21442 is not a palindrome |
| Is 21442 a triangle number? | 21442 is not a triangle number |
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| Base 2 (Binary) | 101001111000010 |
| Base 3 (Ternary) | 1002102011 |
| Base 4 (Quaternary) | 11033002 |
| Base 5 (Quinary) | 1141232 |
| Base 6 (Senary) | 243134 |
| Base 8 (Octal) | 51702 |
| Base 12 (Duodecimal) | 104AA |
| Base 16 (Hexadecimal) | 53C2 |
| Base 20 (Vigesimal) | 2DC2 |
| Is 21442 a prime number? | 21442 is not a prime number |
| Is 21442 a perfect number? | 21442 is not a perfect number |
| Is 21442 a Mersenne prime? | 21442 is not a Mersenne prime |
| Is 21442 a Fermat prime? | 21442 is not a Fermat prime |
| Is 21442 a Fibonacci prime? | 21442 is not a Fibonacci prime |
| Is 21442 a partition prime? | 21442 is not a partition prime |
| Is 21442 a Pell prime? | 21442 is not a Pell prime |
| Prime Factors | Prime factors of 21442 |
| 21442 in Roman numerals | XXMCDXLII |
| 21442 in Chinese numerals | 貳萬壹仟肆佰肆拾貳 |
| 21442 in Babylonian numerals | ![]() |
| 21442 in Egyptian numerals | 𓂮𓆼𓍥𓎉𓏻 |
| Is 21442 a square number? | 21442 is not a square number |
| Is 21442 a cube number? | 21442 is not a cube number |
| Square root of 21442 | 146.43087106208 |
| Cube root of 21442 | 27.781462029843 |
| Number 21442 reversed | 24412 |
| Sum of the digits | 13 |
| Number of digits | 5 |
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