12868321 has 2 divisors, whose sum is σ = 12868322. Its totient is φ = 12868320.

The previous prime is 12868319. The next prime is 12868333. The reversal of 12868321 is 12386821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9486400 + 3381921 = 3080^2 + 1839^2 .

It is a cyclic number.

It is not a de Polignac number, because 12868321 - 2¹ = 12868319 is a prime.

Together with 12868319, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (12868381) 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, 6434160 + 6434161.

It is an arithmetic number, because the mean of its divisors is an integer number (6434161).

Almost surely, 2^12868321 is an apocalyptic number.

It is an amenable number.

12868321 is a deficient number, since it is larger than the sum of its proper divisors (1).

12868321 is an equidigital number, since it uses as much as digits as its factorization.

12868321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4608, while the sum is 31.

The square root of 12868321 is about 3587.2442069087. The cubic root of 12868321 is about 234.3368720436.

The spelling of 12868321 in words is "twelve million, eight hundred sixty-eight thousand, three hundred twenty-one".