12631237 has 2 divisors, whose sum is σ = 12631238. Its totient is φ = 12631236.

The previous prime is 12631193. The next prime is 12631261. The reversal of 12631237 is 73213621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12574116 + 57121 = 3546^2 + 239^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12631237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12631277) 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 as a sum of consecutive naturals, namely, 6315618 + 6315619.

It is an arithmetic number, because the mean of its divisors is an integer number (6315619).

Almost surely, 2^12631237 is an apocalyptic number.

It is an amenable number.

12631237 is a deficient number, since it is larger than the sum of its proper divisors (1).

12631237 is an equidigital number, since it uses as much as digits as its factorization.

12631237 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1512, while the sum is 25.

The square root of 12631237 is about 3554.0451600957. The cubic root of 12631237 is about 232.8888133262. Note that the first 4 decimals are identical.

Adding to 12631237 its reverse (73213621), we get a palindrome (85844858).

It can be divided in two parts, 1263 and 1237, that added together give a square (2500 = 50²).

The spelling of 12631237 in words is "twelve million, six hundred thirty-one thousand, two hundred thirty-seven".