12865417 has 2 divisors, whose sum is σ = 12865418. Its totient is φ = 12865416.

The previous prime is 12865409. The next prime is 12865429. The reversal of 12865417 is 71456821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7557001 + 5308416 = 2749^2 + 2304^2 .

It is an emirp because it is prime and its reverse (71456821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12865417 - 2³ = 12865409 is a prime.

It is not a weakly prime, because it can be changed into another prime (12865477) 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, 6432708 + 6432709.

It is an arithmetic number, because the mean of its divisors is an integer number (6432709).

Almost surely, 2^12865417 is an apocalyptic number.

It is an amenable number.

12865417 is a deficient number, since it is larger than the sum of its proper divisors (1).

12865417 is an equidigital number, since it uses as much as digits as its factorization.

12865417 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13440, while the sum is 34.

The square root of 12865417 is about 3586.8394165337. The cubic root of 12865417 is about 234.3192430804.

The spelling of 12865417 in words is "twelve million, eight hundred sixty-five thousand, four hundred seventeen".