642871076 has 24 divisors (see below), whose sum is σ = 1150886016. Its totient is φ = 314069600.

The previous prime is 642871067. The next prime is 642871109. The reversal of 642871076 is 670178246.

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, 124751 + ... + 129801.

It is an arithmetic number, because the mean of its divisors is an integer number (47953584).

Almost surely, 2^642871076 is an apocalyptic number.

It is an amenable number.

642871076 is a deficient number, since it is larger than the sum of its proper divisors (508014940).

642871076 is a wasteful number, since it uses less digits than its factorization.

642871076 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5779 (or 5777 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 41.

The square root of 642871076 is about 25354.9024056493. The cubic root of 642871076 is about 863.0606091684.

The spelling of 642871076 in words is "six hundred forty-two million, eight hundred seventy-one thousand, seventy-six".