642111460 has 24 divisors (see below), whose sum is σ = 1419405120. Its totient is φ = 243326304.

The previous prime is 642111443. The next prime is 642111461. The reversal of 642111460 is 64111246.

It is not an unprimeable number, because it can be changed into a prime (642111461) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 844504 + ... + 845263.

It is an arithmetic number, because the mean of its divisors is an integer number (59141880).

Almost surely, 2^642111460 is an apocalyptic number.

It is an amenable number.

642111460 is an abundant number, since it is smaller than the sum of its proper divisors (777293660).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

642111460 is a wasteful number, since it uses less digits than its factorization.

642111460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1689795 (or 1689793 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 642111460 is about 25339.9183108391. The cubic root of 642111460 is about 862.7205445953.

The spelling of 642111460 in words is "six hundred forty-two million, one hundred eleven thousand, four hundred sixty".