129526986 has 16 divisors (see below), whose sum is σ = 259214400. Its totient is φ = 43148928.

The previous prime is 129526981. The next prime is 129526987. The reversal of 129526986 is 689625921.

It is not an unprimeable number, because it can be changed into a prime (129526981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5530 + ... + 17018.

It is an arithmetic number, because the mean of its divisors is an integer number (16200900).

Almost surely, 2^129526986 is an apocalyptic number.

129526986 is an abundant number, since it is smaller than the sum of its proper divisors (129687414).

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

129526986 is a wasteful number, since it uses less digits than its factorization.

129526986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13373.

The product of its digits is 466560, while the sum is 48.

The square root of 129526986 is about 11380.9923117451. The cubic root of 129526986 is about 505.9645467721.

The spelling of 129526986 in words is "one hundred twenty-nine million, five hundred twenty-six thousand, nine hundred eighty-six".