642466 has 32 divisors (see below), whose sum is σ = 1166400. Its totient is φ = 262080.

The previous prime is 642457. The next prime is 642487. The reversal of 642466 is 664246.

642466 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×642466² = 825525122312, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12096 + ... + 12148.

It is an arithmetic number, because the mean of its divisors is an integer number (36450).

2⁶⁴²⁴⁶⁶ is an apocalyptic number.

642466 is a deficient number, since it is larger than the sum of its proper divisors (523934).

642466 is a wasteful number, since it uses less digits than its factorization.

642466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114.

The product of its digits is 6912, while the sum is 28.

The square root of 642466 is about 801.5397681962. The cubic root of 642466 is about 86.2879298271.

The spelling of 642466 in words is "six hundred forty-two thousand, four hundred sixty-six".