642652105 has 32 divisors (see below), whose sum is σ = 862444800. Its totient is φ = 456855552.

The previous prime is 642652099. The next prime is 642652111. The reversal of 642652105 is 501256246.

642652105 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (642652099) and next prime (642652111).

It is not a de Polignac number, because 642652105 - 2³ = 642652097 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 698836 + ... + 699754.

It is an arithmetic number, because the mean of its divisors is an integer number (26951400).

Almost surely, 2^642652105 is an apocalyptic number.

It is an amenable number.

642652105 is a deficient number, since it is larger than the sum of its proper divisors (219792695).

642652105 is a wasteful number, since it uses less digits than its factorization.

642652105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1393.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 642652105 is about 25350.5839183242. The cubic root of 642652105 is about 862.9626078154.

The spelling of 642652105 in words is "six hundred forty-two million, six hundred fifty-two thousand, one hundred five".