12409311 has 4 divisors (see below), whose sum is σ = 16545752. Its totient is φ = 8272872.

The previous prime is 12409289. The next prime is 12409333. The reversal of 12409311 is 11390421.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (12409289) and next prime (12409333).

It is not a de Polignac number, because 12409311 - 2⁵ = 12409279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12409381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2068216 + ... + 2068221.

It is an arithmetic number, because the mean of its divisors is an integer number (4136438).

Almost surely, 2^12409311 is an apocalyptic number.

12409311 is a deficient number, since it is larger than the sum of its proper divisors (4136441).

12409311 is an equidigital number, since it uses as much as digits as its factorization.

12409311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4136440.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 12409311 is about 3522.6851974027. The cubic root of 12409311 is about 231.5168241267.

Adding to 12409311 its reverse (11390421), we get a palindrome (23799732).

It can be divided in two parts, 12409 and 311, that added together give a triangular number (12720 = T₁₅₉).

The spelling of 12409311 in words is "twelve million, four hundred nine thousand, three hundred eleven".