12205866 has 16 divisors (see below), whose sum is σ = 25696800. Its totient is φ = 3854448.

The previous prime is 12205849. The next prime is 12205867. The reversal of 12205866 is 66850221.

It is not an unprimeable number, because it can be changed into a prime (12205867) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53421 + ... + 53648.

It is an arithmetic number, because the mean of its divisors is an integer number (1606050).

Almost surely, 2^12205866 is an apocalyptic number.

12205866 is an abundant number, since it is smaller than the sum of its proper divisors (13490934).

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

12205866 is a wasteful number, since it uses less digits than its factorization.

12205866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107093.

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 12205866 is about 3493.6894538582. The cubic root of 12205866 is about 230.2446420230.

The spelling of 12205866 in words is "twelve million, two hundred five thousand, eight hundred sixty-six".