129945024 has 84 divisors (see below), whose sum is σ = 406344120. Its totient is φ = 39375360.

The previous prime is 129945019. The next prime is 129945043. The reversal of 129945024 is 420549921.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 129945024.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3919 + ... + 16590.

It is an arithmetic number, because the mean of its divisors is an integer number (4837430).

Almost surely, 2^129945024 is an apocalyptic number.

It is an amenable number.

129945024 is an abundant number, since it is smaller than the sum of its proper divisors (276399096).

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

129945024 is a wasteful number, since it uses less digits than its factorization.

129945024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20538 (or 20525 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 129945024 is about 11399.3431389708. The cubic root of 129945024 is about 506.5082822885.

The spelling of 129945024 in words is "one hundred twenty-nine million, nine hundred forty-five thousand, twenty-four".