129775375 has 8 divisors (see below), whose sum is σ = 161959824. Its totient is φ = 103820200.

The previous prime is 129775363. The next prime is 129775379. The reversal of 129775375 is 573577921.

It is a de Polignac number, because none of the positive numbers 2^k-129775375 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129775379) by changing a digit.

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, 518977 + ... + 519226.

It is an arithmetic number, because the mean of its divisors is an integer number (20244978).

Almost surely, 2^129775375 is an apocalyptic number.

129775375 is a deficient number, since it is larger than the sum of its proper divisors (32184449).

129775375 is an equidigital number, since it uses as much as digits as its factorization.

129775375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1038218 (or 1038208 counting only the distinct ones).

The product of its digits is 463050, while the sum is 46.

The square root of 129775375 is about 11391.8995343182. The cubic root of 129775375 is about 506.2877632756.

The spelling of 129775375 in words is "one hundred twenty-nine million, seven hundred seventy-five thousand, three hundred seventy-five".