642615132 has 24 divisors (see below), whose sum is σ = 1500282000. Its totient is φ = 214084096.

The previous prime is 642615119. The next prime is 642615137. The reversal of 642615132 is 231516246.

642615132 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 642615132.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642615137) 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, 8494 + ... + 36842.

It is an arithmetic number, because the mean of its divisors is an integer number (62511750).

Almost surely, 2^642615132 is an apocalyptic number.

It is an amenable number.

642615132 is an abundant number, since it is smaller than the sum of its proper divisors (857666868).

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

642615132 is a wasteful number, since it uses less digits than its factorization.

642615132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30245 (or 30243 counting only the distinct ones).

The product of its digits is 8640, while the sum is 30.

The square root of 642615132 is about 25349.8546741397. The cubic root of 642615132 is about 862.9460582037.

The spelling of 642615132 in words is "six hundred forty-two million, six hundred fifteen thousand, one hundred thirty-two".