129957572 has 24 divisors (see below), whose sum is σ = 233443392. Its totient is φ = 63280800.

The previous prime is 129957559. The next prime is 129957617. The reversal of 129957572 is 275759921.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22547 + ... + 27717.

It is an arithmetic number, because the mean of its divisors is an integer number (9726808).

Almost surely, 2^129957572 is an apocalyptic number.

It is an amenable number.

129957572 is a deficient number, since it is larger than the sum of its proper divisors (103485820).

129957572 is a wasteful number, since it uses less digits than its factorization.

129957572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5339 (or 5337 counting only the distinct ones).

The product of its digits is 396900, while the sum is 47.

The square root of 129957572 is about 11399.8935082745. The cubic root of 129957572 is about 506.5245852376.

The spelling of 129957572 in words is "one hundred twenty-nine million, nine hundred fifty-seven thousand, five hundred seventy-two".