12631361 has 2 divisors, whose sum is σ = 12631362. Its totient is φ = 12631360.

The previous prime is 12631351. The next prime is 12631373. The reversal of 12631361 is 16313621.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6990736 + 5640625 = 2644^2 + 2375^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12631361 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12631351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6315680 + 6315681.

It is an arithmetic number, because the mean of its divisors is an integer number (6315681).

Almost surely, 2^12631361 is an apocalyptic number.

It is an amenable number.

12631361 is a deficient number, since it is larger than the sum of its proper divisors (1).

12631361 is an equidigital number, since it uses as much as digits as its factorization.

12631361 is an evil number, because the sum of its binary digits is even.

The product of its digits is 648, while the sum is 23.

The square root of 12631361 is about 3554.0626049635. The cubic root of 12631361 is about 232.8895754083.

Adding to 12631361 its reverse (16313621), we get a palindrome (28944982).

It can be divided in two parts, 1 and 2631361, that added together give a palindrome (2631362).

The spelling of 12631361 in words is "twelve million, six hundred thirty-one thousand, three hundred sixty-one".