642052605 has 32 divisors (see below), whose sum is σ = 1068192000. Its totient is φ = 328914432.

The previous prime is 642052597. The next prime is 642052637. The reversal of 642052605 is 506250246.

It is not a de Polignac number, because 642052605 - 2³ = 642052597 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 82857 + ... + 90273.

It is an arithmetic number, because the mean of its divisors is an integer number (33381000).

Almost surely, 2^642052605 is an apocalyptic number.

It is an amenable number.

642052605 is a deficient number, since it is larger than the sum of its proper divisors (426139395).

642052605 is a wasteful number, since it uses less digits than its factorization.

642052605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7653.

The product of its (nonzero) digits is 14400, while the sum is 30.

The square root of 642052605 is about 25338.7569742480. The cubic root of 642052605 is about 862.6941852209.

The spelling of 642052605 in words is "six hundred forty-two million, fifty-two thousand, six hundred five".