12304509 has 16 divisors (see below), whose sum is σ = 19069440. Its totient is φ = 6911280.

The previous prime is 12304507. The next prime is 12304511. The reversal of 12304509 is 90540321.

It is an interprime number because it is at equal distance from previous prime (12304507) and next prime (12304511).

It is not a de Polignac number, because 12304509 - 2¹ = 12304507 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12304507) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3727 + ... + 6204.

It is an arithmetic number, because the mean of its divisors is an integer number (1191840).

Almost surely, 2^12304509 is an apocalyptic number.

It is an amenable number.

12304509 is a deficient number, since it is larger than the sum of its proper divisors (6764931).

12304509 is an equidigital number, since it uses as much as digits as its factorization.

12304509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10000.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 12304509 is about 3507.7783567381. The cubic root of 12304509 is about 230.8632274432.

The spelling of 12304509 in words is "twelve million, three hundred four thousand, five hundred nine".