12566369 has 2 divisors, whose sum is σ = 12566370. Its totient is φ = 12566368.

The previous prime is 12566329. The next prime is 12566419. The reversal of 12566369 is 96366521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8614225 + 3952144 = 2935^2 + 1988^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12566369 is a prime.

It is a super-2 number, since 2×12566369² = 315827259688322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12566329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6283184 + 6283185.

It is an arithmetic number, because the mean of its divisors is an integer number (6283185).

Almost surely, 2^12566369 is an apocalyptic number.

It is an amenable number.

12566369 is a deficient number, since it is larger than the sum of its proper divisors (1).

12566369 is an equidigital number, since it uses as much as digits as its factorization.

12566369 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 58320, while the sum is 38.

The square root of 12566369 is about 3544.9074741099. The cubic root of 12566369 is about 232.4894603462.

The spelling of 12566369 in words is "twelve million, five hundred sixty-six thousand, three hundred sixty-nine".