12729924 has 72 divisors (see below), whose sum is σ = 34856640. Its totient is φ = 3903552.

The previous prime is 12729919. The next prime is 12729947. The reversal of 12729924 is 42992721.

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25057 + ... + 25559.

It is an arithmetic number, because the mean of its divisors is an integer number (484120).

Almost surely, 2^12729924 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12729924, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17428320).

12729924 is an abundant number, since it is smaller than the sum of its proper divisors (22126716).

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

12729924 is a wasteful number, since it uses less digits than its factorization.

12729924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 569 (or 564 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 12729924 is about 3567.9019044811. The cubic root of 12729924 is about 233.4937554404.

The spelling of 12729924 in words is "twelve million, seven hundred twenty-nine thousand, nine hundred twenty-four".