12518437 has 4 divisors (see below), whose sum is σ = 12525516. Its totient is φ = 12511360.

The previous prime is 12518423. The next prime is 12518447. The reversal of 12518437 is 73481521.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 73481521 = 71 ⋅1034951.

It can be written as a sum of positive squares in 2 ways, for example, as 863041 + 11655396 = 929^2 + 3414^2 .

It is a cyclic number.

It is not a de Polignac number, because 12518437 - 2¹¹ = 12516389 is a prime.

It is a super-2 number, since 2×12518437² = 313422529845938, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12518399 and 12518408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12518447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1653 + ... + 5269.

It is an arithmetic number, because the mean of its divisors is an integer number (3131379).

Almost surely, 2^12518437 is an apocalyptic number.

It is an amenable number.

12518437 is a deficient number, since it is larger than the sum of its proper divisors (7079).

12518437 is an equidigital number, since it uses as much as digits as its factorization.

12518437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7078.

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

The square root of 12518437 is about 3538.1403307387. The cubic root of 12518437 is about 232.1934882587.

Adding to 12518437 its reverse (73481521), we get a palindrome (85999958).

The spelling of 12518437 in words is "twelve million, five hundred eighteen thousand, four hundred thirty-seven".