642508262 has 16 divisors (see below), whose sum is σ = 1052702784. Its totient is φ = 291681000.

The previous prime is 642508231. The next prime is 642508331. The reversal of 642508262 is 262805246.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 164 + ... + 35847.

It is an arithmetic number, because the mean of its divisors is an integer number (65793924).

Almost surely, 2^642508262 is an apocalyptic number.

642508262 is a deficient number, since it is larger than the sum of its proper divisors (410194522).

642508262 is a wasteful number, since it uses less digits than its factorization.

642508262 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36835.

The product of its (nonzero) digits is 46080, while the sum is 35.

The square root of 642508262 is about 25347.7466848633. The cubic root of 642508262 is about 862.8982181859.

The spelling of 642508262 in words is "six hundred forty-two million, five hundred eight thousand, two hundred sixty-two".