642692 has 24 divisors (see below), whose sum is σ = 1193472. Its totient is φ = 302400.

The previous prime is 642683. The next prime is 642701. The reversal of 642692 is 296246.

It is an interprime number because it is at equal distance from previous prime (642683) and next prime (642701).

It is a nialpdrome in base 15.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 642692.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8768 + ... + 8840.

It is an arithmetic number, because the mean of its divisors is an integer number (49728).

2⁶⁴²⁶⁹² is an apocalyptic number.

642692 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

642692 is a deficient number, since it is larger than the sum of its proper divisors (550780).

642692 is a wasteful number, since it uses less digits than its factorization.

642692 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179 (or 177 counting only the distinct ones).

The product of its digits is 5184, while the sum is 29.

The square root of 642692 is about 801.6807344573. The cubic root of 642692 is about 86.2980464642.

The spelling of 642692 in words is "six hundred forty-two thousand, six hundred ninety-two".