12457187 has 2 divisors, whose sum is σ = 12457188. Its totient is φ = 12457186.

The previous prime is 12457171. The next prime is 12457189. The reversal of 12457187 is 78175421.

It is a strong prime.

It is an emirp because it is prime and its reverse (78175421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12457187 - 2⁴ = 12457171 is a prime.

Together with 12457189, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12457189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6228593 + 6228594.

It is an arithmetic number, because the mean of its divisors is an integer number (6228594).

Almost surely, 2^12457187 is an apocalyptic number.

12457187 is a deficient number, since it is larger than the sum of its proper divisors (1).

12457187 is an equidigital number, since it uses as much as digits as its factorization.

12457187 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15680, while the sum is 35.

The square root of 12457187 is about 3529.4740401369. The cubic root of 12457187 is about 231.8141781467.

The spelling of 12457187 in words is "twelve million, four hundred fifty-seven thousand, one hundred eighty-seven".