12687057 has 8 divisors (see below), whose sum is σ = 18795680. Its totient is φ = 8458020.

The previous prime is 12687047. The next prime is 12687067. The reversal of 12687057 is 75078621.

12687057 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (12687047) and next prime (12687067).

It is not a de Polignac number, because 12687057 - 2⁸ = 12686801 is a prime.

It is a super-2 number, since 2×12687057² = 321922830642498, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12687047) 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 in 7 ways as a sum of consecutive naturals, for example, 234919 + ... + 234972.

It is an arithmetic number, because the mean of its divisors is an integer number (2349460).

Almost surely, 2^12687057 is an apocalyptic number.

It is an amenable number.

12687057 is a deficient number, since it is larger than the sum of its proper divisors (6108623).

12687057 is an equidigital number, since it uses as much as digits as its factorization.

12687057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 469900 (or 469894 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 36.

The square root of 12687057 is about 3561.8895266417. The cubic root of 12687057 is about 233.2313701894.

The spelling of 12687057 in words is "twelve million, six hundred eighty-seven thousand, fifty-seven".