420
Everything about the number 420 — its names, how to write it in other bases and numeral systems, and what makes it interesting mathematically.
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Names of 420
| Nominal | 420 |
| Cardinal | four hundred twenty |
| Ordinal | 420th |
| This number as US currency | four hundred twenty dollars |
Properties (and some facts) of 420
| Is 420 an odd number? | 420 is not an odd number |
| Is 420 an even number? | 420 is an even number |
| Is 420 a palindrome? | 420 is not a palindrome |
| Is 420 a triangle number? | 420 is not a triangle number |
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420 in other bases
| Base 2 (Binary) | 110100100 |
| Base 3 (Ternary) | 120120 |
| Base 4 (Quaternary) | 12210 |
| Base 5 (Quinary) | 3140 |
| Base 6 (Senary) | 1540 |
| Base 8 (Octal) | 644 |
| Base 12 (Duodecimal) | 2B0 |
| Base 16 (Hexadecimal) | 1A4 |
| Base 20 (Vigesimal) | 110 |
Primes and factors tests for 420
| Is 420 a prime number? | 420 is not a prime number |
| Is 420 a perfect number? | 420 is not a perfect number |
| Is 420 a Mersenne prime? | 420 is not a Mersenne prime |
| Is 420 a Fermat prime? | 420 is not a Fermat prime |
| Is 420 a Fibonacci prime? | 420 is not a Fibonacci prime |
| Is 420 a partition prime? | 420 is not a partition prime |
| Is 420 a Pell prime? | 420 is not a Pell prime |
| Prime Factors | Prime factors of 420 |
420 in other numeral systems
| 420 in Roman numerals | CDXX |
| 420 in Chinese numerals | 肆佰貳拾 |
| 420 in Babylonian numerals |  |
| 420 in Egyptian numerals | 𓍥𓎇 |
Roots and squares for 420
| Is 420 a square number? | 420 is not a square number |
| Is 420 a cube number? | 420 is not a cube number |
| Square root of 420 | 20.493901531919 |
| Cube root of 420 | 7.4888723872185 |
Recreational math for 420
| Number 420 reversed | 024 |
| Sum of the digits | 6 |
| Number of digits | 3 |
Arithmetic tables for 420
Other pages about 420
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