12205806 has 16 divisors (see below), whose sum is σ = 24931584. Its totient is φ = 3981944.

The previous prime is 12205799. The next prime is 12205829. The reversal of 12205806 is 60850221.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21360 + ... + 21923.

It is an arithmetic number, because the mean of its divisors is an integer number (1558224).

Almost surely, 2^12205806 is an apocalyptic number.

12205806 is an abundant number, since it is smaller than the sum of its proper divisors (12725778).

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

12205806 is a wasteful number, since it uses less digits than its factorization.

12205806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43335.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 12205806 is about 3493.6808669368. The cubic root of 12205806 is about 230.2442647536.

The spelling of 12205806 in words is "twelve million, two hundred five thousand, eight hundred six".