12438517 has 16 divisors (see below), whose sum is σ = 15603840. Its totient is φ = 9652032.

The previous prime is 12438511. The next prime is 12438523. The reversal of 12438517 is 71583421.

It is an interprime number because it is at equal distance from previous prime (12438511) and next prime (12438523).

It is not a de Polignac number, because 12438517 - 2¹⁵ = 12405749 is a prime.

It is a super-3 number, since 3×12438517³ (a number of 22 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12438511) 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 15 ways as a sum of consecutive naturals, for example, 3534 + ... + 6112.

It is an arithmetic number, because the mean of its divisors is an integer number (975240).

Almost surely, 2^12438517 is an apocalyptic number.

It is an amenable number.

12438517 is a deficient number, since it is larger than the sum of its proper divisors (3165323).

12438517 is a wasteful number, since it uses less digits than its factorization.

12438517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2652.

The product of its digits is 6720, while the sum is 31.

The square root of 12438517 is about 3526.8281784062. The cubic root of 12438517 is about 231.6983110395.

The spelling of 12438517 in words is "twelve million, four hundred thirty-eight thousand, five hundred seventeen".