129552975 has 18 divisors (see below), whose sum is σ = 232044176. Its totient is φ = 69094800.

The previous prime is 129552961. The next prime is 129553007. The reversal of 129552975 is 579255921.

129552975 is a `hidden beast` number, since 1 + 2 + 9 + 552 + 97 + 5 = 666.

It is not a de Polignac number, because 129552975 - 2⁶ = 129552911 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 129552975.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 287671 + ... + 288120.

Almost surely, 2^129552975 is an apocalyptic number.

129552975 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

129552975 is a deficient number, since it is larger than the sum of its proper divisors (102491201).

129552975 is a wasteful number, since it uses less digits than its factorization.

129552975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 575807 (or 575799 counting only the distinct ones).

The product of its digits is 283500, while the sum is 45.

The square root of 129552975 is about 11382.1340266226. The cubic root of 129552975 is about 505.9983843366.

The spelling of 129552975 in words is "one hundred twenty-nine million, five hundred fifty-two thousand, nine hundred seventy-five".