12729972 has 24 divisors (see below), whose sum is σ = 29940736. Its totient is φ = 4209408.

The previous prime is 12729949. The next prime is 12729973. The reversal of 12729972 is 27992721.

12729972 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 12729972.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12729973) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2653 + ... + 5700.

Almost surely, 2^12729972 is an apocalyptic number.

12729972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12729972 is an abundant number, since it is smaller than the sum of its proper divisors (17210764).

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

12729972 is a wasteful number, since it uses less digits than its factorization.

12729972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8487 (or 8485 counting only the distinct ones).

The product of its digits is 31752, while the sum is 39.

The square root of 12729972 is about 3567.9086311171. The cubic root of 12729972 is about 233.4940489139.

The spelling of 12729972 in words is "twelve million, seven hundred twenty-nine thousand, nine hundred seventy-two".