129651312 has 80 divisors (see below), whose sum is σ = 387475200. Its totient is φ = 36589056.

The previous prime is 129651283. The next prime is 129651317. The reversal of 129651312 is 213156921.

It is a self number, because there is not a number n which added to its sum of digits gives 129651312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129651317) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25564 + ... + 30212.

It is an arithmetic number, because the mean of its divisors is an integer number (4843440).

Almost surely, 2^129651312 is an apocalyptic number.

129651312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129651312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (193737600).

129651312 is an abundant number, since it is smaller than the sum of its proper divisors (257823888).

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

129651312 is a wasteful number, since it uses less digits than its factorization.

129651312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4750 (or 4744 counting only the distinct ones).

The product of its digits is 3240, while the sum is 30.

The square root of 129651312 is about 11386.4530034599. The cubic root of 129651312 is about 506.1263777405.

The spelling of 129651312 in words is "one hundred twenty-nine million, six hundred fifty-one thousand, three hundred twelve".