12518543 has 4 divisors (see below), whose sum is σ = 12856920. Its totient is φ = 12180168.

The previous prime is 12518531. The next prime is 12518557. The reversal of 12518543 is 34581521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34581521 = 13 ⋅2660117.

It is a cyclic number.

It is not a de Polignac number, because 12518543 - 2⁸ = 12518287 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12518573) 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, 169133 + ... + 169206.

It is an arithmetic number, because the mean of its divisors is an integer number (3214230).

Almost surely, 2^12518543 is an apocalyptic number.

12518543 is a deficient number, since it is larger than the sum of its proper divisors (338377).

12518543 is an equidigital number, since it uses as much as digits as its factorization.

12518543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338376.

The product of its digits is 4800, while the sum is 29.

The square root of 12518543 is about 3538.1553103277. The cubic root of 12518543 is about 232.1941436238.

The spelling of 12518543 in words is "twelve million, five hundred eighteen thousand, five hundred forty-three".