12856 has 8 divisors (see below), whose sum is σ = 24120. Its totient is φ = 6424.

The previous prime is 12853. The next prime is 12889. The reversal of 12856 is 65821.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 796 + ... + 811.

It is an arithmetic number, because the mean of its divisors is an integer number (3015).

2¹²⁸⁵⁶ is an apocalyptic number.

It is an amenable number.

12856 is a deficient number, since it is larger than the sum of its proper divisors (11264).

12856 is a wasteful number, since it uses less digits than its factorization.

12856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1613 (or 1609 counting only the distinct ones).

The product of its digits is 480, while the sum is 22.

The square root of 12856 is about 113.3843022645. The cubic root of 12856 is about 23.4262058176.

It can be divided in two parts, 12 and 856, that added together give a palindrome (868).

The spelling of 12856 in words is "twelve thousand, eight hundred fifty-six".