12726631 has 4 divisors (see below), whose sum is σ = 13070632. Its totient is φ = 12382632.

The previous prime is 12726617. The next prime is 12726641. The reversal of 12726631 is 13662721.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12726631 - 2⁷ = 12726503 is a prime.

It is a super-2 number, since 2×12726631² = 323934273220322, which contains 22 as substring.

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 12726631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12726611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 171945 + ... + 172018.

It is an arithmetic number, because the mean of its divisors is an integer number (3267658).

Almost surely, 2^12726631 is an apocalyptic number.

12726631 is a deficient number, since it is larger than the sum of its proper divisors (344001).

12726631 is an equidigital number, since it uses as much as digits as its factorization.

12726631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344000.

The product of its digits is 3024, while the sum is 28.

The square root of 12726631 is about 3567.4403989415. The cubic root of 12726631 is about 233.4736201737.

The spelling of 12726631 in words is "twelve million, seven hundred twenty-six thousand, six hundred thirty-one".