642504574 has 16 divisors (see below), whose sum is σ = 995627520. Its totient is φ = 310645080.

The previous prime is 642504509. The next prime is 642504601. The reversal of 642504574 is 475405246.

It is a super-2 number, since 2×642504574² = 825624255221842952, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94617 + ... + 101179.

It is an arithmetic number, because the mean of its divisors is an integer number (62226720).

Almost surely, 2^642504574 is an apocalyptic number.

642504574 is a deficient number, since it is larger than the sum of its proper divisors (353122946).

642504574 is a wasteful number, since it uses less digits than its factorization.

642504574 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8175.

The product of its (nonzero) digits is 134400, while the sum is 37.

The square root of 642504574 is about 25347.6739366751. The cubic root of 642504574 is about 862.8965671696.

The spelling of 642504574 in words is "six hundred forty-two million, five hundred four thousand, five hundred seventy-four".