12729472 has 32 divisors (see below), whose sum is σ = 28984320. Its totient is φ = 5455104.

The previous prime is 12729439. The next prime is 12729491. The reversal of 12729472 is 27492721.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (32).

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6208 + ... + 7999.

It is an arithmetic number, because the mean of its divisors is an integer number (905760).

Almost surely, 2^12729472 is an apocalyptic number.

It is an amenable number.

12729472 is an abundant number, since it is smaller than the sum of its proper divisors (16254848).

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

12729472 is an equidigital number, since it uses as much as digits as its factorization.

12729472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14228 (or 14216 counting only the distinct ones).

The product of its digits is 14112, while the sum is 34.

The square root of 12729472 is about 3567.8385613702. The cubic root of 12729472 is about 233.4909918621.

The spelling of 12729472 in words is "twelve million, seven hundred twenty-nine thousand, four hundred seventy-two".