642084 has 12 divisors (see below), whose sum is σ = 1498224. Its totient is φ = 214024.

The previous prime is 642079. The next prime is 642113. The reversal of 642084 is 480246.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26742 + ... + 26765.

It is an arithmetic number, because the mean of its divisors is an integer number (124852).

2⁶⁴²⁰⁸⁴ is an apocalyptic number.

It is an amenable number.

642084 is an abundant number, since it is smaller than the sum of its proper divisors (856140).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

642084 is a wasteful number, since it uses less digits than its factorization.

642084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53514 (or 53512 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 642084 is about 801.3014414064. The cubic root of 642084 is about 86.2708246292.

The spelling of 642084 in words is "six hundred forty-two thousand, eighty-four".