129661412 has 12 divisors (see below), whose sum is σ = 228695040. Its totient is φ = 64319976.

The previous prime is 129661387. The next prime is 129661421. The reversal of 129661412 is 214166921.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 127112 + ... + 128127.

It is an arithmetic number, because the mean of its divisors is an integer number (19057920).

Almost surely, 2^129661412 is an apocalyptic number.

It is an amenable number.

129661412 is a deficient number, since it is larger than the sum of its proper divisors (99033628).

129661412 is a wasteful number, since it uses less digits than its factorization.

129661412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255370 (or 255368 counting only the distinct ones).

The product of its digits is 5184, while the sum is 32.

The square root of 129661412 is about 11386.8965043158. The cubic root of 129661412 is about 506.1395200260.

The spelling of 129661412 in words is "one hundred twenty-nine million, six hundred sixty-one thousand, four hundred twelve".