12418509 has 4 divisors (see below), whose sum is σ = 16558016. Its totient is φ = 8279004.

The previous prime is 12418501. The next prime is 12418513. The reversal of 12418509 is 90581421.

It is a happy number.

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.

It is not a de Polignac number, because 12418509 - 2³ = 12418501 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 (12418501) 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, 2069749 + ... + 2069754.

It is an arithmetic number, because the mean of its divisors is an integer number (4139504).

Almost surely, 2^12418509 is an apocalyptic number.

It is an amenable number.

12418509 is a deficient number, since it is larger than the sum of its proper divisors (4139507).

12418509 is an equidigital number, since it uses as much as digits as its factorization.

12418509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4139506.

The product of its (nonzero) digits is 2880, while the sum is 30.

The square root of 12418509 is about 3523.9904937443. The cubic root of 12418509 is about 231.5740114496.

The spelling of 12418509 in words is "twelve million, four hundred eighteen thousand, five hundred nine".