12865687 has 2 divisors, whose sum is σ = 12865688. Its totient is φ = 12865686.

The previous prime is 12865681. The next prime is 12865709. The reversal of 12865687 is 78656821.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12865687 is a prime.

It is a super-3 number, since 3×12865687³ (a number of 22 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12865681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6432843 + 6432844.

It is an arithmetic number, because the mean of its divisors is an integer number (6432844).

Almost surely, 2^12865687 is an apocalyptic number.

12865687 is a deficient number, since it is larger than the sum of its proper divisors (1).

12865687 is an equidigital number, since it uses as much as digits as its factorization.

12865687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 161280, while the sum is 43.

The square root of 12865687 is about 3586.8770539287. The cubic root of 12865687 is about 234.3208822487.

The spelling of 12865687 in words is "twelve million, eight hundred sixty-five thousand, six hundred eighty-seven".