12804817 has 2 divisors, whose sum is σ = 12804818. Its totient is φ = 12804816.

The previous prime is 12804811. The next prime is 12804851. The reversal of 12804817 is 71840821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7403841 + 5400976 = 2721^2 + 2324^2 .

It is a cyclic number.

It is not a de Polignac number, because 12804817 - 2³ = 12804809 is a prime.

It is not a weakly prime, because it can be changed into another prime (12804811) 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, 6402408 + 6402409.

It is an arithmetic number, because the mean of its divisors is an integer number (6402409).

Almost surely, 2^12804817 is an apocalyptic number.

It is an amenable number.

12804817 is a deficient number, since it is larger than the sum of its proper divisors (1).

12804817 is an equidigital number, since it uses as much as digits as its factorization.

12804817 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3584, while the sum is 31.

The square root of 12804817 is about 3578.3818968914. The cubic root of 12804817 is about 233.9507591132.

The spelling of 12804817 in words is "twelve million, eight hundred four thousand, eight hundred seventeen".