129642875 has 8 divisors (see below), whose sum is σ = 161794464. Its totient is φ = 103714200.

The previous prime is 129642869. The next prime is 129642911. The reversal of 129642875 is 578246921.

It is a happy number.

It is not a de Polignac number, because 129642875 - 2⁴ = 129642859 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, 518447 + ... + 518696.

It is an arithmetic number, because the mean of its divisors is an integer number (20224308).

Almost surely, 2^129642875 is an apocalyptic number.

129642875 is a deficient number, since it is larger than the sum of its proper divisors (32151589).

129642875 is an equidigital number, since it uses as much as digits as its factorization.

129642875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1037158 (or 1037148 counting only the distinct ones).

The product of its digits is 241920, while the sum is 44.

The square root of 129642875 is about 11386.0825133142. The cubic root of 129642875 is about 506.1153988546.

The spelling of 129642875 in words is "one hundred twenty-nine million, six hundred forty-two thousand, eight hundred seventy-five".