129457712 has 10 divisors (see below), whose sum is σ = 250824348. Its totient is φ = 64728848.

The previous prime is 129457661. The next prime is 129457721. The reversal of 129457712 is 217754921.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4045538 + ... + 4045569.

Almost surely, 2^129457712 is an apocalyptic number.

It is an amenable number.

129457712 is a deficient number, since it is larger than the sum of its proper divisors (121366636).

129457712 is an equidigital number, since it uses as much as digits as its factorization.

129457712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8091115 (or 8091109 counting only the distinct ones).

The product of its digits is 35280, while the sum is 38.

The square root of 129457712 is about 11377.9484969831. The cubic root of 129457712 is about 505.8743302093.

The spelling of 129457712 in words is "one hundred twenty-nine million, four hundred fifty-seven thousand, seven hundred twelve".