420 (number)
From Infogalactic: the planetary knowledge core
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| Cardinal | four hundred twenty | |||
| Ordinal | 420th (four hundred and twentieth) |
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| Factorization | 22× 3 × 5 × 7 | |||
| Roman numeral | CDXX | |||
| Binary | 1101001002 | |||
| Ternary | 1201203 | |||
| Quaternary | 122104 | |||
| Quinary | 31405 | |||
| Senary | 15406 | |||
| Octal | 6448 | |||
| Duodecimal | 2B012 | |||
| Hexadecimal | 1A416 | |||
| Vigesimal | 11020 | |||
| Base 36 | BO36 | |||
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420 is the natural number following 419 and preceding 421.
420 is the sum of four consecutive primes (101 + 103 + 107 + 109). 420 is a zero of the Mertens function and is sparsely totient. It is a pronic number, and the smallest number divisible by the numbers 1 to 7, and as a consequence of that it is a Harshad number in every base from 2 to 10 except base 5. It is a 141-gonal number.
