12685867 has 4 divisors (see below), whose sum is σ = 12859720. Its totient is φ = 12512016.

The previous prime is 12685861. The next prime is 12685873. The reversal of 12685867 is 76858621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 76858621 = 7 ⋅10979803.

It is an interprime number because it is at equal distance from previous prime (12685861) and next prime (12685873).

It is a cyclic number.

It is not a de Polignac number, because 12685867 - 2¹⁵ = 12653099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12685861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86817 + ... + 86962.

It is an arithmetic number, because the mean of its divisors is an integer number (3214930).

Almost surely, 2^12685867 is an apocalyptic number.

12685867 is a deficient number, since it is larger than the sum of its proper divisors (173853).

12685867 is an equidigital number, since it uses as much as digits as its factorization.

12685867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173852.

The product of its digits is 161280, while the sum is 43.

The square root of 12685867 is about 3561.7224765554. The cubic root of 12685867 is about 233.2240778754.

The spelling of 12685867 in words is "twelve million, six hundred eighty-five thousand, eight hundred sixty-seven".