12646817 has 2 divisors, whose sum is σ = 12646818. Its totient is φ = 12646816.

The previous prime is 12646801. The next prime is 12646831. The reversal of 12646817 is 71864621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12645136 + 1681 = 3556^2 + 41^2 .

It is a cyclic number.

It is not a de Polignac number, because 12646817 - 2⁴ = 12646801 is a prime.

It is not a weakly prime, because it can be changed into another prime (12646867) 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, 6323408 + 6323409.

It is an arithmetic number, because the mean of its divisors is an integer number (6323409).

Almost surely, 2^12646817 is an apocalyptic number.

It is an amenable number.

12646817 is a deficient number, since it is larger than the sum of its proper divisors (1).

12646817 is an equidigital number, since it uses as much as digits as its factorization.

12646817 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16128, while the sum is 35.

The square root of 12646817 is about 3556.2363532251. The cubic root of 12646817 is about 232.9845262247.

The spelling of 12646817 in words is "twelve million, six hundred forty-six thousand, eight hundred seventeen".