129213292 has 12 divisors (see below), whose sum is σ = 243517456. Its totient is φ = 59636880.

The previous prime is 129213289. The next prime is 129213313. The reversal of 129213292 is 292312921.

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, 1242384 + ... + 1242487.

Almost surely, 2^129213292 is an apocalyptic number.

It is an amenable number.

129213292 is a deficient number, since it is larger than the sum of its proper divisors (114304164).

129213292 is a wasteful number, since it uses less digits than its factorization.

129213292 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2484888 (or 2484886 counting only the distinct ones).

The product of its digits is 3888, while the sum is 31.

The square root of 129213292 is about 11367.2024702651. The cubic root of 129213292 is about 505.5557610558. Note that the first 3 decimals are identical.

The spelling of 129213292 in words is "one hundred twenty-nine million, two hundred thirteen thousand, two hundred ninety-two".