12681856 has 32 divisors (see below), whose sum is σ = 27564480. Its totient is φ = 5763840.

The previous prime is 12681853. The next prime is 12681859. The reversal of 12681856 is 65818621.

It is an interprime number because it is at equal distance from previous prime (12681853) and next prime (12681859).

It is a tau number, because it is divible by the number of its divisors (32).

It is not an unprimeable number, because it can be changed into a prime (12681853) 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, 3096 + ... + 5911.

It is an arithmetic number, because the mean of its divisors is an integer number (861390).

Almost surely, 2^12681856 is an apocalyptic number.

12681856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12681856 is an abundant number, since it is smaller than the sum of its proper divisors (14882624).

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

12681856 is an equidigital number, since it uses as much as digits as its factorization.

12681856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9032 (or 9020 counting only the distinct ones).

The product of its digits is 23040, while the sum is 37.

The square root of 12681856 is about 3561.1593617809. The cubic root of 12681856 is about 233.1994951282.

The spelling of 12681856 in words is "twelve million, six hundred eighty-one thousand, eight hundred fifty-six".