12786 has 8 divisors (see below), whose sum is σ = 25584. Its totient is φ = 4260.

The previous prime is 12781. The next prime is 12791. The reversal of 12786 is 68721.

It is an interprime number because it is at equal distance from previous prime (12781) and next prime (12791).

It is a sphenic number, since it is the product of 3 distinct primes.

12786 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (12781) 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, 1060 + ... + 1071.

It is an arithmetic number, because the mean of its divisors is an integer number (3198).

2¹²⁷⁸⁶ is an apocalyptic number.

12786 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12792).

12786 is a wasteful number, since it uses less digits than its factorization.

12786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2136.

The product of its digits is 672, while the sum is 24.

The square root of 12786 is about 113.0751962192. The cubic root of 12786 is about 23.3836104094.

The spelling of 12786 in words is "twelve thousand, seven hundred eighty-six".