12166856 has 16 divisors (see below), whose sum is σ = 24567900. Its totient is φ = 5615424.

The previous prime is 12166853. The next prime is 12166879. The reversal of 12166856 is 65866121.

It is a happy number.

12166856 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 11764900 + 401956 = 3430^2 + 634^2 .

It is not an unprimeable number, because it can be changed into a prime (12166853) 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, 58391 + ... + 58598.

Almost surely, 2^12166856 is an apocalyptic number.

It is an amenable number.

12166856 is an abundant number, since it is smaller than the sum of its proper divisors (12401044).

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

12166856 is a wasteful number, since it uses less digits than its factorization.

12166856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117008 (or 117004 counting only the distinct ones).

The product of its digits is 17280, while the sum is 35.

The square root of 12166856 is about 3488.1020627269. The cubic root of 12166856 is about 229.9990926240. Note that the first 3 decimals are identical.

The spelling of 12166856 in words is "twelve million, one hundred sixty-six thousand, eight hundred fifty-six".