12424009 has 4 divisors (see below), whose sum is σ = 13379716. Its totient is φ = 11468304.

The previous prime is 12424007. The next prime is 12424019. The reversal of 12424009 is 90042421.

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

It can be written as a sum of positive squares in 2 ways, for example, as 727609 + 11696400 = 853^2 + 3420^2 .

It is a cyclic number.

It is not a de Polignac number, because 12424009 - 2¹ = 12424007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12424001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 477834 + ... + 477859.

It is an arithmetic number, because the mean of its divisors is an integer number (3344929).

Almost surely, 2^12424009 is an apocalyptic number.

It is an amenable number.

12424009 is a deficient number, since it is larger than the sum of its proper divisors (955707).

12424009 is an equidigital number, since it uses as much as digits as its factorization.

12424009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 955706.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 12424009 is about 3524.7707726886. The cubic root of 12424009 is about 231.6081934673.

The spelling of 12424009 in words is "twelve million, four hundred twenty-four thousand, nine".