12864569 has 2 divisors, whose sum is σ = 12864570. Its totient is φ = 12864568.

The previous prime is 12864559. The next prime is 12864581. The reversal of 12864569 is 96546821.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12673600 + 190969 = 3560^2 + 437^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12864569 is a prime.

It is a super-2 number, since 2×12864569² = 330994271111522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12864559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6432284 + 6432285.

It is an arithmetic number, because the mean of its divisors is an integer number (6432285).

Almost surely, 2^12864569 is an apocalyptic number.

It is an amenable number.

12864569 is a deficient number, since it is larger than the sum of its proper divisors (1).

12864569 is an equidigital number, since it uses as much as digits as its factorization.

12864569 is an evil number, because the sum of its binary digits is even.

The product of its digits is 103680, while the sum is 41.

The square root of 12864569 is about 3586.7212046659. The cubic root of 12864569 is about 234.3140947284.

The spelling of 12864569 in words is "twelve million, eight hundred sixty-four thousand, five hundred sixty-nine".