12205009 has 2 divisors, whose sum is σ = 12205010. Its totient is φ = 12205008.

The previous prime is 12205001. The next prime is 12205021. The reversal of 12205009 is 90050221.

12205009 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7006609 + 5198400 = 2647^2 + 2280^2 .

It is a cyclic number.

It is not a de Polignac number, because 12205009 - 2³ = 12205001 is a prime.

It is not a weakly prime, because it can be changed into another prime (12205001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6102504 + 6102505.

It is an arithmetic number, because the mean of its divisors is an integer number (6102505).

Almost surely, 2^12205009 is an apocalyptic number.

It is an amenable number.

12205009 is a deficient number, since it is larger than the sum of its proper divisors (1).

12205009 is an equidigital number, since it uses as much as digits as its factorization.

12205009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 12205009 is about 3493.5668019948. The cubic root of 12205009 is about 230.2392532404.

The spelling of 12205009 in words is "twelve million, two hundred five thousand, nine".