12509438 has 8 divisors (see below), whose sum is σ = 18784920. Its totient is φ = 6247800.

The previous prime is 12509437. The next prime is 12509479. The reversal of 12509438 is 83490521.

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

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12509437) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 788 + ... + 5063.

It is an arithmetic number, because the mean of its divisors is an integer number (2348115).

Almost surely, 2^12509438 is an apocalyptic number.

12509438 is a deficient number, since it is larger than the sum of its proper divisors (6275482).

12509438 is a wasteful number, since it uses less digits than its factorization.

12509438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6922.

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

The square root of 12509438 is about 3536.8683888434. The cubic root of 12509438 is about 232.1378367401.

Adding to 12509438 its reverse (83490521), we get a palindrome (95999959).

The spelling of 12509438 in words is "twelve million, five hundred nine thousand, four hundred thirty-eight".