12257387 has 2 divisors, whose sum is σ = 12257388. Its totient is φ = 12257386.

The previous prime is 12257381. The next prime is 12257389. The reversal of 12257387 is 78375221.

12257387 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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12257387 is a prime.

Together with 12257389, 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 (12257381) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6128693 + 6128694.

It is an arithmetic number, because the mean of its divisors is an integer number (6128694).

Almost surely, 2^12257387 is an apocalyptic number.

12257387 is a deficient number, since it is larger than the sum of its proper divisors (1).

12257387 is an equidigital number, since it uses as much as digits as its factorization.

12257387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23520, while the sum is 35.

The square root of 12257387 is about 3501.0551266725. The cubic root of 12257387 is about 230.5681417450.

The spelling of 12257387 in words is "twelve million, two hundred fifty-seven thousand, three hundred eighty-seven".