12726317 has 4 divisors (see below), whose sum is σ = 12746460. Its totient is φ = 12706176.

The previous prime is 12726313. The next prime is 12726361. The reversal of 12726317 is 71362721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 71362721 = 23 ⋅3102727.

It can be written as a sum of positive squares in 2 ways, for example, as 1240996 + 11485321 = 1114^2 + 3389^2 .

It is a cyclic number.

It is not a de Polignac number, because 12726317 - 2² = 12726313 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12726317.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12726313) 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, 9092 + ... + 10397.

It is an arithmetic number, because the mean of its divisors is an integer number (3186615).

Almost surely, 2^12726317 is an apocalyptic number.

It is an amenable number.

12726317 is a deficient number, since it is larger than the sum of its proper divisors (20143).

12726317 is an equidigital number, since it uses as much as digits as its factorization.

12726317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20142.

The product of its digits is 3528, while the sum is 29.

The square root of 12726317 is about 3567.3963895256. The cubic root of 12726317 is about 233.4717000185.

The spelling of 12726317 in words is "twelve million, seven hundred twenty-six thousand, three hundred seventeen".