129055685 has 32 divisors (see below), whose sum is σ = 174379392. Its totient is φ = 90881280.

The previous prime is 129055669. The next prime is 129055699. The reversal of 129055685 is 586550921.

It is not a de Polignac number, because 129055685 - 2⁴ = 129055669 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 465767 + ... + 466043.

It is an arithmetic number, because the mean of its divisors is an integer number (5449356).

Almost surely, 2^129055685 is an apocalyptic number.

It is an amenable number.

129055685 is a deficient number, since it is larger than the sum of its proper divisors (45323707).

129055685 is a wasteful number, since it uses less digits than its factorization.

129055685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 533.

The product of its (nonzero) digits is 108000, while the sum is 41.

The square root of 129055685 is about 11360.2678225471. The cubic root of 129055685 is about 505.3501280708.

The spelling of 129055685 in words is "one hundred twenty-nine million, fifty-five thousand, six hundred eighty-five".