12859321 has 2 divisors, whose sum is σ = 12859322. Its totient is φ = 12859320.

The previous prime is 12859303. The next prime is 12859331. The reversal of 12859321 is 12395821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10169721 + 2689600 = 3189^2 + 1640^2 .

It is an emirp because it is prime and its reverse (12395821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12859321 - 2⁵ = 12859289 is a prime.

It is not a weakly prime, because it can be changed into another prime (12859331) 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 as a sum of consecutive naturals, namely, 6429660 + 6429661.

It is an arithmetic number, because the mean of its divisors is an integer number (6429661).

Almost surely, 2^12859321 is an apocalyptic number.

It is an amenable number.

12859321 is a deficient number, since it is larger than the sum of its proper divisors (1).

12859321 is an equidigital number, since it uses as much as digits as its factorization.

12859321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4320, while the sum is 31.

The square root of 12859321 is about 3585.9895426507. The cubic root of 12859321 is about 234.2822281959.

The spelling of 12859321 in words is "twelve million, eight hundred fifty-nine thousand, three hundred twenty-one".