642542072 has 16 divisors (see below), whose sum is σ = 1205042400. Its totient is φ = 321197440.

The previous prime is 642542059. The next prime is 642542083. The reversal of 642542072 is 270245246.

642542072 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51329 + ... + 62607.

It is an arithmetic number, because the mean of its divisors is an integer number (75315150).

Almost surely, 2^642542072 is an apocalyptic number.

It is an amenable number.

642542072 is a deficient number, since it is larger than the sum of its proper divisors (562500328).

642542072 is a wasteful number, since it uses less digits than its factorization.

642542072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18406 (or 18402 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 32.

The square root of 642542072 is about 25348.4135992768. The cubic root of 642542072 is about 862.9133536992.

The spelling of 642542072 in words is "six hundred forty-two million, five hundred forty-two thousand, seventy-two".