129744012 has 24 divisors (see below), whose sum is σ = 315899136. Its totient is φ = 41367568.

The previous prime is 129743993. The next prime is 129744019. The reversal of 129744012 is 210447921.

It is a super-2 number, since 2×129744012² = 33667017299712288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (129744019) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 234768 + ... + 235319.

It is an arithmetic number, because the mean of its divisors is an integer number (13162464).

Almost surely, 2^129744012 is an apocalyptic number.

129744012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

129744012 is an abundant number, since it is smaller than the sum of its proper divisors (186155124).

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

129744012 is a wasteful number, since it uses less digits than its factorization.

129744012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 470117 (or 470115 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 129744012 is about 11390.5229028346. The cubic root of 129744012 is about 506.2469748943.

The spelling of 129744012 in words is "one hundred twenty-nine million, seven hundred forty-four thousand, twelve".