12724417 has 8 divisors (see below), whose sum is σ = 13380840. Its totient is φ = 12082560.

The previous prime is 12724351. The next prime is 12724421. The reversal of 12724417 is 71442721.

It can be written as a sum of positive squares in 4 ways, for example, as 341056 + 12383361 = 584^2 + 3519^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12724417 - 2¹⁵ = 12691649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12724447) 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, 1828 + ... + 5365.

It is an arithmetic number, because the mean of its divisors is an integer number (1672605).

Almost surely, 2^12724417 is an apocalyptic number.

It is an amenable number.

12724417 is a deficient number, since it is larger than the sum of its proper divisors (656423).

12724417 is an equidigital number, since it uses as much as digits as its factorization.

12724417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7283.

The product of its digits is 3136, while the sum is 28.

The square root of 12724417 is about 3567.1300789290. The cubic root of 12724417 is about 233.4600805712.

The spelling of 12724417 in words is "twelve million, seven hundred twenty-four thousand, four hundred seventeen".