642374526 has 16 divisors (see below), whose sum is σ = 1285701264. Its totient is φ = 213966144.

The previous prime is 642374503. The next prime is 642374531. The reversal of 642374526 is 625473246.

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, 30751 + ... + 47226.

It is an arithmetic number, because the mean of its divisors is an integer number (80356329).

Almost surely, 2^642374526 is an apocalyptic number.

642374526 is an abundant number, since it is smaller than the sum of its proper divisors (643326738).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

642374526 is a wasteful number, since it uses less digits than its factorization.

642374526 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79355.

The product of its digits is 241920, while the sum is 39.

The square root of 642374526 is about 25345.1085221587. The cubic root of 642374526 is about 862.8383442145.

The spelling of 642374526 in words is "six hundred forty-two million, three hundred seventy-four thousand, five hundred twenty-six".