420 (number)

← 419 420 421 →
List of numbers — Integers ← 0 100 200 300 400 500 600 700 800 900 →
Cardinal	four hundred twenty
Ordinal	420th (four hundred twentieth)
Factorization	22× 3 × 5 × 7
Greek numeral	ΥΚ´
Roman numeral	CDXX
Binary	1101001002
Ternary	1201203
Quaternary	122104
Quinary	31405
Senary	15406
Octal	6448
Duodecimal	2B012
Hexadecimal	1A416
Vigesimal	11020
Base 36	BO36

420 (four hundred [and] twenty) is the natural number following 419 and preceding 421.

In mathematics

420 is:

• the sum of four consecutive primes ($101+103+107+109$).
• the sum of the first twenty positive even numbers.
• a zero of the Mertens function and is sparsely totient.
• a pronic number.
• The least common multiple of numbers from 1 through 7; as a consequence of that, it is a Harshad number in bases 2 to 10, except in base 5.
• a 141-gonal number.
• a balanced number.
• largely composite number

In other fields

• The international country code for Czech Republic.
• 420 (pronounced four-twenty) is also cannabis culture slang for cannabis consumption.

References

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