129247412 has 12 divisors (see below), whose sum is σ = 258494880. Its totient is φ = 55391736.

The previous prime is 129247409. The next prime is 129247429. The reversal of 129247412 is 214742921.

It is a happy number.

129247412 is an admirable number.

It is a congruent number.

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, 2307962 + ... + 2308017.

It is an arithmetic number, because the mean of its divisors is an integer number (21541240).

Almost surely, 2^129247412 is an apocalyptic number.

It is an amenable number.

129247412 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

129247412 is a wasteful number, since it uses less digits than its factorization.

129247412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4615990 (or 4615988 counting only the distinct ones).

The product of its digits is 8064, while the sum is 32.

The square root of 129247412 is about 11368.7031802224. The cubic root of 129247412 is about 505.6002560770.

The spelling of 129247412 in words is "one hundred twenty-nine million, two hundred forty-seven thousand, four hundred twelve".