12867187 has 2 divisors, whose sum is σ = 12867188. Its totient is φ = 12867186.

The previous prime is 12867131. The next prime is 12867209. The reversal of 12867187 is 78176821.

12867187 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (78176821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12867187 - 2⁷ = 12867059 is a prime.

It is not a weakly prime, because it can be changed into another prime (12867587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6433593 + 6433594.

It is an arithmetic number, because the mean of its divisors is an integer number (6433594).

Almost surely, 2^12867187 is an apocalyptic number.

12867187 is a deficient number, since it is larger than the sum of its proper divisors (1).

12867187 is an equidigital number, since it uses as much as digits as its factorization.

12867187 is an evil number, because the sum of its binary digits is even.

The product of its digits is 37632, while the sum is 40.

The square root of 12867187 is about 3587.0861433760. The cubic root of 12867187 is about 234.3299883220.

The spelling of 12867187 in words is "twelve million, eight hundred sixty-seven thousand, one hundred eighty-seven".