12684687 has 16 divisors (see below), whose sum is σ = 17604480. Its totient is φ = 8114400.

The previous prime is 12684677. The next prime is 12684701. The reversal of 12684687 is 78648621.

12684687 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12684687 - 2⁴ = 12684671 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12684667) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18012 + ... + 18702.

It is an arithmetic number, because the mean of its divisors is an integer number (1100280).

Almost surely, 2^12684687 is an apocalyptic number.

12684687 is a deficient number, since it is larger than the sum of its proper divisors (4919793).

12684687 is a wasteful number, since it uses less digits than its factorization.

12684687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 934.

The product of its digits is 129024, while the sum is 42.

The square root of 12684687 is about 3561.5568225146. The cubic root of 12684687 is about 233.2168463911.

The spelling of 12684687 in words is "twelve million, six hundred eighty-four thousand, six hundred eighty-seven".