12805617 has 16 divisors (see below), whose sum is σ = 19270080. Its totient is φ = 7492800.

The previous prime is 12805613. The next prime is 12805621. The reversal of 12805617 is 71650821.

It is an interprime number because it is at equal distance from previous prime (12805613) and next prime (12805621).

It is not a de Polignac number, because 12805617 - 2² = 12805613 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12805613) 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 in 15 ways as a sum of consecutive naturals, for example, 5734 + ... + 7647.

It is an arithmetic number, because the mean of its divisors is an integer number (1204380).

Almost surely, 2^12805617 is an apocalyptic number.

It is an amenable number.

12805617 is a deficient number, since it is larger than the sum of its proper divisors (6464463).

12805617 is a wasteful number, since it uses less digits than its factorization.

12805617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13424.

The product of its (nonzero) digits is 3360, while the sum is 30.

The square root of 12805617 is about 3578.4936775129. The cubic root of 12805617 is about 233.9556311523.

The spelling of 12805617 in words is "twelve million, eight hundred five thousand, six hundred seventeen".