12112409 has 2 divisors, whose sum is σ = 12112410. Its totient is φ = 12112408.

The previous prime is 12112403. The next prime is 12112411. The reversal of 12112409 is 90421121.

12112409 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11055625 + 1056784 = 3325^2 + 1028^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12112409 is a prime.

Together with 12112411, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12112403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6056204 + 6056205.

It is an arithmetic number, because the mean of its divisors is an integer number (6056205).

Almost surely, 2^12112409 is an apocalyptic number.

It is an amenable number.

12112409 is a deficient number, since it is larger than the sum of its proper divisors (1).

12112409 is an equidigital number, since it uses as much as digits as its factorization.

12112409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 12112409 is about 3480.2886374552. The cubic root of 12112409 is about 229.6554955855.

It can be divided in two parts, 12112 and 409, that added together give a palindrome (12521).

The spelling of 12112409 in words is "twelve million, one hundred twelve thousand, four hundred nine".