990021
Everything about the number 990021 — its names, how to write it in other bases and numeral systems, and what makes it interesting mathematically.
Names of 990021
| Nominal | 990021 |
| Cardinal | nine hundred ninety thousand twenty-one |
| Ordinal | 990,021st |
| This number as US currency | nine hundred ninety thousand twenty-one dollars |
Properties (and some facts) of 990021
| Is 990021 an odd number? | 990021 is an odd number |
| Is 990021 an even number? | 990021 is not an even number |
| Is 990021 a palindrome? | 990021 is not a palindrome |
| Is 990021 a triangle number? | 990021 is not a triangle number |
990021 in other bases
| Base 2 (Binary) | 11110001101101000101 |
| Base 3 (Ternary) | 1212022001110 |
| Base 4 (Quaternary) | 3301231011 |
| Base 5 (Quinary) | 223140041 |
| Base 6 (Senary) | 33115233 |
| Base 8 (Octal) | 3615505 |
| Base 12 (Duodecimal) | 3B8B19 |
| Base 16 (Hexadecimal) | F1B45 |
| Base 20 (Vigesimal) | 63F11 |
Primes and factors tests for 990021
| Is 990021 a prime number? | 990021 is not a prime number |
| Is 990021 a perfect number? | 990021 is not a perfect number |
| Is 990021 a Mersenne prime? | 990021 is not a Mersenne prime |
| Is 990021 a Fermat prime? | 990021 is not a Fermat prime |
| Is 990021 a Fibonacci prime? | 990021 is not a Fibonacci prime |
| Is 990021 a partition prime? | 990021 is not a partition prime |
| Is 990021 a Pell prime? | 990021 is not a Pell prime |
| Prime Factors | Prime factors of 990021 |
990021 in other numeral systems
| 990021 in Roman numerals | CMXCXXI |
| 990021 in Chinese numerals | 玖拾萬玖萬貳拾壹 |
| 990021 in Babylonian numerals |    |
| 990021 in Egyptian numerals | 𓆐𓆐𓆐𓆐𓆐𓆐𓆐𓆐𓆐𓂵𓎇𓏺 |
Roots and squares for 990021
| Is 990021 a square number? | 990021 is not a square number |
| Is 990021 a cube number? | 990021 is not a cube number |
| Square root of 990021 | 994.99798994772 |
| Cube root of 990021 | 99.666254042181 |
Recreational math for 990021
| Number 990021 reversed | 120099 |
| Sum of the digits | 21 |
| Number of digits | 6 |