129255135 has 16 divisors (see below), whose sum is σ = 210314880. Its totient is φ = 67767200.

The previous prime is 129255109. The next prime is 129255173. The reversal of 129255135 is 531552921.

It is not a de Polignac number, because 129255135 - 2⁵ = 129255103 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 129255096 and 129255105.

It is a congruent 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 15 ways as a sum of consecutive naturals, for example, 72141 + ... + 73910.

It is an arithmetic number, because the mean of its divisors is an integer number (13144680).

Almost surely, 2^129255135 is an apocalyptic number.

129255135 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

129255135 is a deficient number, since it is larger than the sum of its proper divisors (81059745).

129255135 is a wasteful number, since it uses less digits than its factorization.

129255135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146118.

The product of its digits is 13500, while the sum is 33.

The square root of 129255135 is about 11369.0428357008. The cubic root of 129255135 is about 505.6103263573.

The spelling of 129255135 in words is "one hundred twenty-nine million, two hundred fifty-five thousand, one hundred thirty-five".