642595807 has 8 divisors (see below), whose sum is σ = 758085632. Its totient is φ = 533028600.

The previous prime is 642595799. The next prime is 642595813. The reversal of 642595807 is 708595246.

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

It is a cyclic number.

It is not a de Polignac number, because 642595807 - 2³ = 642595799 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642595847) by changing a digit.

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, 1480419 + ... + 1480852.

It is an arithmetic number, because the mean of its divisors is an integer number (94760704).

Almost surely, 2^642595807 is an apocalyptic number.

642595807 is a deficient number, since it is larger than the sum of its proper divisors (115489825).

642595807 is a wasteful number, since it uses less digits than its factorization.

642595807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2961309.

The product of its (nonzero) digits is 604800, while the sum is 46.

The square root of 642595807 is about 25349.4735053807. The cubic root of 642595807 is about 862.9374078214.

The spelling of 642595807 in words is "six hundred forty-two million, five hundred ninety-five thousand, eight hundred seven".