12686427 has 24 divisors (see below), whose sum is σ = 20420400. Its totient is φ = 7535808.

The previous prime is 12686423. The next prime is 12686431. The reversal of 12686427 is 72468621.

12686427 is a `hidden beast` number, since 1 + 2 + 6 + 8 + 642 + 7 = 666.

It is an interprime number because it is at equal distance from previous prime (12686423) and next prime (12686431).

It is not a de Polignac number, because 12686427 - 2² = 12686423 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12686391 and 12686400.

It is not an unprimeable number, because it can be changed into a prime (12686423) 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 23 ways as a sum of consecutive naturals, for example, 1524 + ... + 5262.

It is an arithmetic number, because the mean of its divisors is an integer number (850850).

Almost surely, 2^12686427 is an apocalyptic number.

12686427 is a deficient number, since it is larger than the sum of its proper divisors (7733973).

12686427 is a wasteful number, since it uses less digits than its factorization.

12686427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3787 (or 3784 counting only the distinct ones).

The product of its digits is 32256, while the sum is 36.

The square root of 12686427 is about 3561.8010893367. The cubic root of 12686427 is about 233.2275096094.

The spelling of 12686427 in words is "twelve million, six hundred eighty-six thousand, four hundred twenty-seven".