129013724 has 48 divisors (see below), whose sum is σ = 273208320. Its totient is φ = 52073280.

The previous prime is 129013639. The next prime is 129013727. The reversal of 129013724 is 427310921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129013727) 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, 104189 + ... + 105419.

It is an arithmetic number, because the mean of its divisors is an integer number (5691840).

Almost surely, 2^129013724 is an apocalyptic number.

129013724 is a gapful number since it is divisible by the number (14) 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 129013724, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (136604160).

129013724 is an abundant number, since it is smaller than the sum of its proper divisors (144194596).

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

129013724 is a wasteful number, since it uses less digits than its factorization.

129013724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1458 (or 1456 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 129013724 is about 11358.4208409444. The cubic root of 129013724 is about 505.2953525028.

The spelling of 129013724 in words is "one hundred twenty-nine million, thirteen thousand, seven hundred twenty-four".