642132004 has 12 divisors (see below), whose sum is σ = 1125942300. Its totient is φ = 320434208.

The previous prime is 642131993. The next prime is 642132013. The reversal of 642132004 is 400231246.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 285677604 + 356454400 = 16902^2 + 18880^2 .

It is a super-2 number, since 2×642132004² = 824667021122112032, 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, 155659 + ... + 159730.

It is an arithmetic number, because the mean of its divisors is an integer number (93828525).

Almost surely, 2^642132004 is an apocalyptic number.

It is an amenable number.

642132004 is a deficient number, since it is larger than the sum of its proper divisors (483810296).

642132004 is a wasteful number, since it uses less digits than its factorization.

642132004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315902 (or 315900 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 642132004 is about 25340.3236759123. The cubic root of 642132004 is about 862.7297452522.

The spelling of 642132004 in words is "six hundred forty-two million, one hundred thirty-two thousand, four".