12438509 has 8 divisors (see below), whose sum is σ = 13204800. Its totient is φ = 11676096.

The previous prime is 12438499. The next prime is 12438511. The reversal of 12438509 is 90583421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12438509 - 2¹⁶ = 12372973 is a prime.

It is a super-2 number, since 2×12438509² = 309433012286162, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12438529) 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 7 ways as a sum of consecutive naturals, for example, 8192 + ... + 9590.

It is an arithmetic number, because the mean of its divisors is an integer number (1650600).

Almost surely, 2^12438509 is an apocalyptic number.

It is an amenable number.

12438509 is a deficient number, since it is larger than the sum of its proper divisors (766291).

12438509 is a wasteful number, since it uses less digits than its factorization.

12438509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1939.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 12438509 is about 3526.8270442425. The cubic root of 12438509 is about 231.6982613661.

The spelling of 12438509 in words is "twelve million, four hundred thirty-eight thousand, five hundred nine".