129265828 has 12 divisors (see below), whose sum is σ = 226869552. Its totient is φ = 64445960.

The previous prime is 129265733. The next prime is 129265853. The reversal of 129265828 is 828562921.

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, 45178 + ... + 47953.

It is an arithmetic number, because the mean of its divisors is an integer number (18905796).

Almost surely, 2^129265828 is an apocalyptic number.

It is an amenable number.

129265828 is a deficient number, since it is larger than the sum of its proper divisors (97603724).

129265828 is a wasteful number, since it uses less digits than its factorization.

129265828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93482 (or 93480 counting only the distinct ones).

The product of its digits is 138240, while the sum is 43.

The square root of 129265828 is about 11369.5130942358. The cubic root of 129265828 is about 505.6242686586.

The spelling of 129265828 in words is "one hundred twenty-nine million, two hundred sixty-five thousand, eight hundred twenty-eight".