12438547 has 4 divisors (see below), whose sum is σ = 13569336. Its totient is φ = 11307760.

The previous prime is 12438529. The next prime is 12438553. The reversal of 12438547 is 74583421.

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

It is a cyclic number.

It is not a de Polignac number, because 12438547 - 2¹⁵ = 12405779 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12438247) 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, 565378 + ... + 565399.

It is an arithmetic number, because the mean of its divisors is an integer number (3392334).

Almost surely, 2^12438547 is an apocalyptic number.

12438547 is a deficient number, since it is larger than the sum of its proper divisors (1130789).

12438547 is a wasteful number, since it uses less digits than its factorization.

12438547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1130788.

The product of its digits is 26880, while the sum is 34.

The square root of 12438547 is about 3526.8324315170. The cubic root of 12438547 is about 231.6984973142.

The spelling of 12438547 in words is "twelve million, four hundred thirty-eight thousand, five hundred forty-seven".