129261088 has 24 divisors (see below), whose sum is σ = 277618320. Its totient is φ = 58754880.

The previous prime is 129261071. The next prime is 129261107. The reversal of 129261088 is 880162921.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 183258 + ... + 183961.

It is an arithmetic number, because the mean of its divisors is an integer number (11567430).

Almost surely, 2^129261088 is an apocalyptic number.

It is an amenable number.

129261088 is an abundant number, since it is smaller than the sum of its proper divisors (148357232).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

129261088 is a wasteful number, since it uses less digits than its factorization.

129261088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 367240 (or 367232 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 37.

The square root of 129261088 is about 11369.3046401264. The cubic root of 129261088 is about 505.6180884011.

The spelling of 129261088 in words is "one hundred twenty-nine million, two hundred sixty-one thousand, eighty-eight".