12855187 has 2 divisors, whose sum is σ = 12855188. Its totient is φ = 12855186.

The previous prime is 12855131. The next prime is 12855211. The reversal of 12855187 is 78155821.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12855187 is a prime.

It is not a weakly prime, because it can be changed into another prime (12855107) 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, 6427593 + 6427594.

It is an arithmetic number, because the mean of its divisors is an integer number (6427594).

Almost surely, 2^12855187 is an apocalyptic number.

12855187 is a deficient number, since it is larger than the sum of its proper divisors (1).

12855187 is an equidigital number, since it uses as much as digits as its factorization.

12855187 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22400, while the sum is 37.

The square root of 12855187 is about 3585.4130863821. The cubic root of 12855187 is about 234.2571199097.

The spelling of 12855187 in words is "twelve million, eight hundred fifty-five thousand, one hundred eighty-seven".