642831134 has 24 divisors (see below), whose sum is σ = 1062702984. Its totient is φ = 291416400.

The previous prime is 642831131. The next prime is 642831181. The reversal of 642831134 is 431138246.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 642831134.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642831131) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 92729 + ... + 99419.

It is an arithmetic number, because the mean of its divisors is an integer number (44279291).

Almost surely, 2^642831134 is an apocalyptic number.

642831134 is a deficient number, since it is larger than the sum of its proper divisors (419871850).

642831134 is a wasteful number, since it uses less digits than its factorization.

642831134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7112 (or 7101 counting only the distinct ones).

The product of its digits is 13824, while the sum is 32.

The square root of 642831134 is about 25354.1147350879. The cubic root of 642831134 is about 863.0427346250.

The spelling of 642831134 in words is "six hundred forty-two million, eight hundred thirty-one thousand, one hundred thirty-four".