12806249 has 2 divisors, whose sum is σ = 12806250. Its totient is φ = 12806248.

The previous prime is 12806203. The next prime is 12806257. The reversal of 12806249 is 94260821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12730624 + 75625 = 3568^2 + 275^2 .

It is an emirp because it is prime and its reverse (94260821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12806249 - 2⁸ = 12805993 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12806449) 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, 6403124 + 6403125.

It is an arithmetic number, because the mean of its divisors is an integer number (6403125).

Almost surely, 2^12806249 is an apocalyptic number.

It is an amenable number.

12806249 is a deficient number, since it is larger than the sum of its proper divisors (1).

12806249 is an equidigital number, since it uses as much as digits as its factorization.

12806249 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 12806249 is about 3578.5819817352. The cubic root of 12806249 is about 233.9594799198.

The spelling of 12806249 in words is "twelve million, eight hundred six thousand, two hundred forty-nine".