12436681 has 2 divisors, whose sum is σ = 12436682. Its totient is φ = 12436680.

The previous prime is 12436651. The next prime is 12436709. The reversal of 12436681 is 18663421.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6843456 + 5593225 = 2616^2 + 2365^2 .

It is a cyclic number.

It is not a de Polignac number, because 12436681 - 2⁷ = 12436553 is a prime.

It is a super-2 number, since 2×12436681² = 309342068591522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12436651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6218340 + 6218341.

It is an arithmetic number, because the mean of its divisors is an integer number (6218341).

Almost surely, 2^12436681 is an apocalyptic number.

It is an amenable number.

12436681 is a deficient number, since it is larger than the sum of its proper divisors (1).

12436681 is an equidigital number, since it uses as much as digits as its factorization.

12436681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6912, while the sum is 31.

The square root of 12436681 is about 3526.5678782635. The cubic root of 12436681 is about 231.6869104566.

The spelling of 12436681 in words is "twelve million, four hundred thirty-six thousand, six hundred eighty-one".