129124572 has 24 divisors (see below), whose sum is σ = 302038800. Its totient is φ = 42934656.

The previous prime is 129124531. The next prime is 129124601. The reversal of 129124572 is 275421921.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8247 + ... + 18062.

It is an arithmetic number, because the mean of its divisors is an integer number (12584950).

Almost surely, 2^129124572 is an apocalyptic number.

129124572 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

129124572 is an abundant number, since it is smaller than the sum of its proper divisors (172914228).

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

129124572 is a wasteful number, since it uses less digits than its factorization.

129124572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26725 (or 26723 counting only the distinct ones).

The product of its digits is 10080, while the sum is 33.

The square root of 129124572 is about 11363.2993448206. The cubic root of 129124572 is about 505.4400268927.

The spelling of 129124572 in words is "one hundred twenty-nine million, one hundred twenty-four thousand, five hundred seventy-two".