642496 has 14 divisors (see below), whose sum is σ = 1275080. Its totient is φ = 321216.

The previous prime is 642487. The next prime is 642517. The reversal of 642496 is 694246.

It is a super-2 number, since 2×642496² = 825602220032, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4956 + ... + 5083.

2⁶⁴²⁴⁹⁶ is an apocalyptic number.

It is an amenable number.

642496 is a deficient number, since it is larger than the sum of its proper divisors (632584).

642496 is a wasteful number, since it uses less digits than its factorization.

642496 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10051 (or 10041 counting only the distinct ones).

The product of its digits is 10368, while the sum is 31.

The square root of 642496 is about 801.5584819587. The cubic root of 642496 is about 86.2892728801.

Adding to 642496 its product of digits (10368), we get a square (652864 = 808²).

The spelling of 642496 in words is "six hundred forty-two thousand, four hundred ninety-six".