129265228 has 12 divisors (see below), whose sum is σ = 231027552. Its totient is φ = 63257360.

The previous prime is 129265219. The next prime is 129265247. The reversal of 129265228 is 822562921.

It is a super-5 number, since 5×129265228⁵ (a number of 42 digits) contains 55555 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 343603 + ... + 343978.

It is an arithmetic number, because the mean of its divisors is an integer number (19252296).

Almost surely, 2^129265228 is an apocalyptic number.

It is an amenable number.

129265228 is a deficient number, since it is larger than the sum of its proper divisors (101762324).

129265228 is a wasteful number, since it uses less digits than its factorization.

129265228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 687632 (or 687630 counting only the distinct ones).

The product of its digits is 34560, while the sum is 37.

The square root of 129265228 is about 11369.4867078510. The cubic root of 129265228 is about 505.6234863559.

The spelling of 129265228 in words is "one hundred twenty-nine million, two hundred sixty-five thousand, two hundred twenty-eight".