642426002 has 8 divisors (see below), whose sum is σ = 964945200. Its totient is φ = 320777604.

The previous prime is 642425981. The next prime is 642426011. The reversal of 642426002 is 200624246.

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

It is a super-2 number, since 2×642426002² = 825422336091408008, which contains 22 as substring.

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, 215852 + ... + 218807.

It is an arithmetic number, because the mean of its divisors is an integer number (120618150).

Almost surely, 2^642426002 is an apocalyptic number.

642426002 is a deficient number, since it is larger than the sum of its proper divisors (322519198).

642426002 is a wasteful number, since it uses less digits than its factorization.

642426002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435400.

The product of its (nonzero) digits is 4608, while the sum is 26.

The square root of 642426002 is about 25346.1240034842. The cubic root of 642426002 is about 862.8613911435.

The spelling of 642426002 in words is "six hundred forty-two million, four hundred twenty-six thousand, two".