129375128 has 16 divisors (see below), whose sum is σ = 244351080. Its totient is φ = 64214848.

The previous prime is 129375101. The next prime is 129375137. The reversal of 129375128 is 821573921.

It is a junction number, because it is equal to n+sod(n) for n = 129375091 and 129375100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57926 + ... + 60117.

Almost surely, 2^129375128 is an apocalyptic number.

It is an amenable number.

129375128 is a deficient number, since it is larger than the sum of its proper divisors (114975952).

129375128 is a wasteful number, since it uses less digits than its factorization.

129375128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118186 (or 118182 counting only the distinct ones).

The product of its digits is 30240, while the sum is 38.

The square root of 129375128 is about 11374.3187927893. The cubic root of 129375128 is about 505.7667377718.

The spelling of 129375128 in words is "one hundred twenty-nine million, three hundred seventy-five thousand, one hundred twenty-eight".