642052534 has 4 divisors (see below), whose sum is σ = 963078804. Its totient is φ = 321026266.

The previous prime is 642052517. The next prime is 642052591. The reversal of 642052534 is 435250246.

642052534 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 642052496 and 642052505.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160513132 + ... + 160513135.

It is an arithmetic number, because the mean of its divisors is an integer number (240769701).

Almost surely, 2^642052534 is an apocalyptic number.

642052534 is a deficient number, since it is larger than the sum of its proper divisors (321026270).

642052534 is a wasteful number, since it uses less digits than its factorization.

642052534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321026269.

The product of its (nonzero) digits is 28800, while the sum is 31.

The square root of 642052534 is about 25338.7555732321. The cubic root of 642052534 is about 862.6941534212.

The spelling of 642052534 in words is "six hundred forty-two million, fifty-two thousand, five hundred thirty-four".