12724913 has 4 divisors (see below), whose sum is σ = 12740208. Its totient is φ = 12709620.

The previous prime is 12724909. The next prime is 12724919. The reversal of 12724913 is 31942721.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12724913 - 2² = 12724909 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12724919) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6323 + ... + 8088.

It is an arithmetic number, because the mean of its divisors is an integer number (3185052).

Almost surely, 2^12724913 is an apocalyptic number.

It is an amenable number.

12724913 is a deficient number, since it is larger than the sum of its proper divisors (15295).

12724913 is an equidigital number, since it uses as much as digits as its factorization.

12724913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15294.

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

The square root of 12724913 is about 3567.1996019287. The cubic root of 12724913 is about 233.4631139701.

The spelling of 12724913 in words is "twelve million, seven hundred twenty-four thousand, nine hundred thirteen".