129251275 has 12 divisors (see below), whose sum is σ = 160425000. Its totient is φ = 103302080.

The previous prime is 129251267. The next prime is 129251333. The reversal of 129251275 is 572152921.

It is not a de Polignac number, because 129251275 - 2³ = 129251267 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 129251275.

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 11 ways as a sum of consecutive naturals, for example, 35751 + ... + 39199.

It is an arithmetic number, because the mean of its divisors is an integer number (13368750).

Almost surely, 2^129251275 is an apocalyptic number.

129251275 is a deficient number, since it is larger than the sum of its proper divisors (31173725).

129251275 is a wasteful number, since it uses less digits than its factorization.

129251275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4958 (or 4953 counting only the distinct ones).

The product of its digits is 12600, while the sum is 34.

The square root of 129251275 is about 11368.8730751997. The cubic root of 129251275 is about 505.6052932232.

The spelling of 129251275 in words is "one hundred twenty-nine million, two hundred fifty-one thousand, two hundred seventy-five".