12564281 has 2 divisors, whose sum is σ = 12564282. Its totient is φ = 12564280.

The previous prime is 12564259. The next prime is 12564287. The reversal of 12564281 is 18246521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12538681 + 25600 = 3541^2 + 160^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12564281 is a prime.

It is a super-2 number, since 2×12564281² = 315722314093922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12564287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6282140 + 6282141.

It is an arithmetic number, because the mean of its divisors is an integer number (6282141).

Almost surely, 2^12564281 is an apocalyptic number.

It is an amenable number.

12564281 is a deficient number, since it is larger than the sum of its proper divisors (1).

12564281 is an equidigital number, since it uses as much as digits as its factorization.

12564281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3840, while the sum is 29.

The square root of 12564281 is about 3544.6129548937. The cubic root of 12564281 is about 232.4765829886.

The spelling of 12564281 in words is "twelve million, five hundred sixty-four thousand, two hundred eighty-one".