129275875 has 8 divisors (see below), whose sum is σ = 161336448. Its totient is φ = 103420600.

The previous prime is 129275857. The next prime is 129275899. The reversal of 129275875 is 578572921.

It is a happy number.

It is not a de Polignac number, because 129275875 - 2⁵ = 129275843 is a prime.

It is a Duffinian 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, 516979 + ... + 517228.

It is an arithmetic number, because the mean of its divisors is an integer number (20167056).

Almost surely, 2^129275875 is an apocalyptic number.

129275875 is a deficient number, since it is larger than the sum of its proper divisors (32060573).

129275875 is an equidigital number, since it uses as much as digits as its factorization.

129275875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1034222 (or 1034212 counting only the distinct ones).

The product of its digits is 352800, while the sum is 46.

The square root of 129275875 is about 11369.9549251525. The cubic root of 129275875 is about 505.6373679582.

The spelling of 129275875 in words is "one hundred twenty-nine million, two hundred seventy-five thousand, eight hundred seventy-five".