642892 has 6 divisors (see below), whose sum is σ = 1125068. Its totient is φ = 321444.

The previous prime is 642881. The next prime is 642899. The reversal of 642892 is 298246.

It is not an unprimeable number, because it can be changed into a prime (642899) by changing a digit.

642892 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80358 + ... + 80365.

2⁶⁴²⁸⁹² is an apocalyptic number.

It is an amenable number.

642892 is a deficient number, since it is larger than the sum of its proper divisors (482176).

642892 is a wasteful number, since it uses less digits than its factorization.

642892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160727 (or 160725 counting only the distinct ones).

The product of its digits is 6912, while the sum is 31.

The square root of 642892 is about 801.8054626903. The cubic root of 642892 is about 86.3069972624.

The spelling of 642892 in words is "six hundred forty-two thousand, eight hundred ninety-two".