129743712 has 144 divisors (see below), whose sum is σ = 425617920. Its totient is φ = 36723456.

The previous prime is 129743699. The next prime is 129743729. The reversal of 129743712 is 217347921.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 279993 + ... + 280455.

It is an arithmetic number, because the mean of its divisors is an integer number (2955680).

Almost surely, 2^129743712 is an apocalyptic number.

129743712 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 129743712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (212808960).

129743712 is an abundant number, since it is smaller than the sum of its proper divisors (295874208).

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

129743712 is a wasteful number, since it uses less digits than its factorization.

129743712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 625 (or 614 counting only the distinct ones).

The product of its digits is 21168, while the sum is 36.

The square root of 129743712 is about 11390.5097339847. The cubic root of 129743712 is about 506.2465847049.

The spelling of 129743712 in words is "one hundred twenty-nine million, seven hundred forty-three thousand, seven hundred twelve".