129313512 has 24 divisors (see below), whose sum is σ = 350224290. Its totient is φ = 43104480.

The previous prime is 129313511. The next prime is 129313517. The reversal of 129313512 is 215313921.

It can be written as a sum of positive squares in only one way, i.e., 124411716 + 4901796 = 11154^2 + 2214^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is not an unprimeable number, because it can be changed into a prime (129313511) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 897939 + ... + 898082.

Almost surely, 2^129313512 is an apocalyptic number.

129313512 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

129313512 is an abundant number, since it is smaller than the sum of its proper divisors (220910778).

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

129313512 is a wasteful number, since it uses less digits than its factorization.

129313512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1796033 (or 1796026 counting only the distinct ones).

The product of its digits is 1620, while the sum is 27.

The square root of 129313512 is about 11371.6099124091. The cubic root of 129313512 is about 505.6864331249.

The spelling of 129313512 in words is "one hundred twenty-nine million, three hundred thirteen thousand, five hundred twelve".