642545246 has 16 divisors (see below), whose sum is σ = 1137039360. Its totient is φ = 266493240.

The previous prime is 642545237. The next prime is 642545261.

642545246 is nontrivially palindromic in base 10.

It is a Curzon number.

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, 739826 + ... + 740693.

It is an arithmetic number, because the mean of its divisors is an integer number (71064960).

Almost surely, 2^642545246 is an apocalyptic number.

642545246 is a deficient number, since it is larger than the sum of its proper divisors (494494114).

642545246 is a wasteful number, since it uses less digits than its factorization.

642545246 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1480559.

The product of its digits is 230400, while the sum is 38.

The square root of 642545246 is about 25348.4762066677. The cubic root of 642545246 is about 862.9147745568.

The spelling of 642545246 in words is "six hundred forty-two million, five hundred forty-five thousand, two hundred forty-six".