642869134 has 8 divisors (see below), whose sum is σ = 995410368. Its totient is φ = 311065680.

The previous prime is 642869119. The next prime is 642869147. The reversal of 642869134 is 431968246.

It is a happy number.

642869134 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 5184367 + ... + 5184490.

It is an arithmetic number, because the mean of its divisors is an integer number (124426296).

Almost surely, 2^642869134 is an apocalyptic number.

642869134 is a deficient number, since it is larger than the sum of its proper divisors (352541234).

642869134 is a wasteful number, since it uses less digits than its factorization.

642869134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10368890.

The product of its digits is 248832, while the sum is 43.

The square root of 642869134 is about 25354.8641092789. The cubic root of 642869134 is about 863.0597401163.

The spelling of 642869134 in words is "six hundred forty-two million, eight hundred sixty-nine thousand, one hundred thirty-four".