12041209 has 4 divisors (see below), whose sum is σ = 12073360. Its totient is φ = 12009060.

The previous prime is 12041191. The next prime is 12041233. The reversal of 12041209 is 90214021.

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, and also an emirpimes, since its reverse is a distinct semiprime: 90214021 = 1249 ⋅72229.

It is a cyclic number.

It is not a de Polignac number, because 12041209 - 2¹³ = 12033017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12041279) 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, 15507 + ... + 16264.

It is an arithmetic number, because the mean of its divisors is an integer number (3018340).

Almost surely, 2^12041209 is an apocalyptic number.

It is an amenable number.

12041209 is a deficient number, since it is larger than the sum of its proper divisors (32151).

12041209 is an equidigital number, since it uses as much as digits as its factorization.

12041209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32150.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 12041209 is about 3470.0445242100. The cubic root of 12041209 is about 229.2046186988.

It can be divided in two parts, 1 and 2041209, that added together give a triangular number (2041210 = T₂₀₂₀).

The spelling of 12041209 in words is "twelve million, forty-one thousand, two hundred nine".