642565246 has 8 divisors (see below), whose sum is σ = 972690840. Its totient is φ = 318334968.

The previous prime is 642565213. The next prime is 642565289.

642565246 is nontrivially palindromic in base 10.

642565246 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a junction number, because it is equal to n+sod(n) for n = 642565199 and 642565208.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1473556 + ... + 1473991.

It is an arithmetic number, because the mean of its divisors is an integer number (121586355).

Almost surely, 2^642565246 is an apocalyptic number.

642565246 is a deficient number, since it is larger than the sum of its proper divisors (330125594).

642565246 is a wasteful number, since it uses less digits than its factorization.

642565246 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2947658.

The product of its digits is 345600, while the sum is 40.

The square root of 642565246 is about 25348.8707046290. The cubic root of 642565246 is about 862.9237275535.

The spelling of 642565246 in words is "six hundred forty-two million, five hundred sixty-five thousand, two hundred forty-six".