Names of 642991
| Nominal | 642991 |
| Cardinal | six hundred forty-two thousand nine hundred ninety-one |
| Ordinal | 642,991st |
| This number as US currency | six hundred forty-two thousand nine hundred ninety-one dollars |
| Is 642991 an odd number? | 642991 is an odd number |
| Is 642991 an even number? | 642991 is NOT an even number |
| Is 642991 a palindrome? | 642991 is NOT a palindrome number |
| Is 642991 a triangle number? | 642991 is NOT a triangle number |
642991 in other Bases
| Base 2 (Binary) | 100111001111101011112 |
| Base 3 (Ternary) | 10122000001113 |
| Base 4 (Quaternary) | 21303322334 |
| Base 5 (Quinary) | 1310334315 |
| Base 6 (Senary) | 214404516 |
| Base 8 (Octal) | 23476578 |
| Base 12 (Duodecimal) | 27012712 |
| Base 16 (Hexadecimal) | 9CFAF16 |
| Base 20 (Vigesimal) | 4079B20 |
Primes and Factors tests for 642991
| Is 642991 a Prime Number? | 642991 is NOT a prime |
| Is 642991 a perfect number? | 642991 is NOT a perfect number |
| Is 642991 a Mersenne Prime? | 642991 is NOT a Mersenne prime |
| Is 642991 a Fermat Prime? | 642991 is NOT a Fermat prime |
| Is 642991 a Fibonacci Prime? | 642991 is NOT a Fibonacci prime |
| Is 642991 a Partition Prime? | 642991 is NOT a Partition prime |
| Is 642991 a Pell Prime? | 642991 is NOT a Pell prime |
| Prime Factors | Prime factors of 642991 |
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642991 in other Numerals
| 642991 in Roman Numeral | DCXLMMCMXCI |
| 642991 in Chinese Numeral | 陸拾萬肆萬貳仟玖佰玖拾壹 |
| 642991 in Egyptian Numeral | 𓆐𓆐𓆐𓆐𓆐𓆐𓂰𓆽𓍪𓎎𓏺 |
| 642991 in Babylonian Numeral |     |
Roots and stuff for 642991
| Is 642991 a square number? | 642991 is NOT a square number |
| Is 642991 a cube number? | 642991 is NOT a cube number |
| Square root of the number 642991 | 801.86719598697 |
| Cube root of the number 642991 | 86.311427220655 |
Recreational math for 642991
| Number 642991 reversed | 199246 |
| Sum of the digits | 31 |
| No of digits | 6 |