642635134 has 16 divisors (see below), whose sum is σ = 1006774272. Its totient is φ = 307069048.

The previous prime is 642635117. The next prime is 642635141. The reversal of 642635134 is 431536246.

It is a self number, because there is not a number n which added to its sum of digits gives 642635134.

It is a congruent number.

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, 50547 + ... + 61969.

It is an arithmetic number, because the mean of its divisors is an integer number (62923392).

Almost surely, 2^642635134 is an apocalyptic number.

642635134 is a deficient number, since it is larger than the sum of its proper divisors (364139138).

642635134 is a wasteful number, since it uses less digits than its factorization.

642635134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12671.

The product of its digits is 51840, while the sum is 34.

The square root of 642635134 is about 25350.2491900967. The cubic root of 642635134 is about 862.9550114465.

The spelling of 642635134 in words is "six hundred forty-two million, six hundred thirty-five thousand, one hundred thirty-four".