129255125 has 16 divisors (see below), whose sum is σ = 161936112. Its totient is φ = 103003200.

The previous prime is 129255109. The next prime is 129255173. The reversal of 129255125 is 521552921.

It can be written as a sum of positive squares in 8 ways, for example, as 61324561 + 67930564 = 7831^2 + 8242^2 .

It is not a de Polignac number, because 129255125 - 2⁴ = 129255109 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 129255091 and 129255100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32759 + ... + 36491.

It is an arithmetic number, because the mean of its divisors is an integer number (10121007).

Almost surely, 2^129255125 is an apocalyptic number.

It is an amenable number.

129255125 is a deficient number, since it is larger than the sum of its proper divisors (32680987).

129255125 is an equidigital number, since it uses as much as digits as its factorization.

129255125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4025 (or 4015 counting only the distinct ones).

The product of its digits is 9000, while the sum is 32.

The square root of 129255125 is about 11369.0423959100. The cubic root of 129255125 is about 505.6103133182.

The spelling of 129255125 in words is "one hundred twenty-nine million, two hundred fifty-five thousand, one hundred twenty-five".