12043209 has 4 divisors (see below), whose sum is σ = 16057616. Its totient is φ = 8028804.

The previous prime is 12043193. The next prime is 12043211. The reversal of 12043209 is 90234021.

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 not a de Polignac number, because 12043209 - 2⁴ = 12043193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12043219) 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, 2007199 + ... + 2007204.

It is an arithmetic number, because the mean of its divisors is an integer number (4014404).

Almost surely, 2^12043209 is an apocalyptic number.

It is an amenable number.

12043209 is a deficient number, since it is larger than the sum of its proper divisors (4014407).

12043209 is an equidigital number, since it uses as much as digits as its factorization.

12043209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4014406.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 12043209 is about 3470.3326929849. The cubic root of 12043209 is about 229.2173080077.

The spelling of 12043209 in words is "twelve million, forty-three thousand, two hundred nine".