12678687 has 40 divisors (see below), whose sum is σ = 22070400. Its totient is φ = 7103376.

The previous prime is 12678671. The next prime is 12678689. The reversal of 12678687 is 78687621.

It is not a de Polignac number, because 12678687 - 2⁴ = 12678671 is a prime.

Its product of digits (225792) is a multiple of the sum of its prime divisors (448).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12678689) 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 in 39 ways as a sum of consecutive naturals, for example, 33264 + ... + 33642.

It is an arithmetic number, because the mean of its divisors is an integer number (551760).

Almost surely, 2^12678687 is an apocalyptic number.

12678687 is a deficient number, since it is larger than the sum of its proper divisors (9391713).

12678687 is an equidigital number, since it uses as much as digits as its factorization.

12678687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 457 (or 448 counting only the distinct ones).

The product of its digits is 225792, while the sum is 45.

The square root of 12678687 is about 3560.7143946124. The cubic root of 12678687 is about 233.1800691923.

The spelling of 12678687 in words is "twelve million, six hundred seventy-eight thousand, six hundred eighty-seven".