12242409 has 4 divisors (see below), whose sum is σ = 16323216. Its totient is φ = 8161604.

The previous prime is 12242359. The next prime is 12242423. The reversal of 12242409 is 90424221.

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: 90424221 = 3 ⋅30141407.

It is a cyclic number.

It is not a de Polignac number, because 12242409 - 2¹² = 12238313 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12242429) 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, 2040399 + ... + 2040404.

It is an arithmetic number, because the mean of its divisors is an integer number (4080804).

Almost surely, 2^12242409 is an apocalyptic number.

It is an amenable number.

12242409 is a deficient number, since it is larger than the sum of its proper divisors (4080807).

12242409 is an equidigital number, since it uses as much as digits as its factorization.

12242409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4080806.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 12242409 is about 3498.9154033786. The cubic root of 12242409 is about 230.4741886799.

The spelling of 12242409 in words is "twelve million, two hundred forty-two thousand, four hundred nine".