12055209 has 4 divisors (see below), whose sum is σ = 16073616. Its totient is φ = 8036804.

The previous prime is 12055207. The next prime is 12055231. The reversal of 12055209 is 90255021.

12055209 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12055209 - 2¹ = 12055207 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12055207) 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, 2009199 + ... + 2009204.

It is an arithmetic number, because the mean of its divisors is an integer number (4018404).

Almost surely, 2^12055209 is an apocalyptic number.

It is an amenable number.

12055209 is a deficient number, since it is larger than the sum of its proper divisors (4018407).

12055209 is an equidigital number, since it uses as much as digits as its factorization.

12055209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4018406.

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 12055209 is about 3472.0612033776. The cubic root of 12055209 is about 229.2934143739.

The spelling of 12055209 in words is "twelve million, fifty-five thousand, two hundred nine".