129575171252 has 24 divisors (see below), whose sum is σ = 230184726912. Its totient is φ = 63809967200.

The previous prime is 129575171221. The next prime is 129575171281. The reversal of 129575171252 is 252171575921.

It is a junction number, because it is equal to n+sod(n) for n = 129575171197 and 129575171206.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47102 + ... + 511242.

It is an arithmetic number, because the mean of its divisors is an integer number (9591030288).

Almost surely, 2^129575171252 is an apocalyptic number.

It is an amenable number.

129575171252 is a deficient number, since it is larger than the sum of its proper divisors (100609555660).

129575171252 is a wasteful number, since it uses less digits than its factorization.

129575171252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 465199 (or 465197 counting only the distinct ones).

The product of its digits is 441000, while the sum is 47.

The spelling of 129575171252 in words is "one hundred twenty-nine billion, five hundred seventy-five million, one hundred seventy-one thousand, two hundred fifty-two".