420 (number)

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 ==