12516543 has 12 divisors (see below), whose sum is σ = 19470360. Its totient is φ = 7702416.

The previous prime is 12516481. The next prime is 12516563. The reversal of 12516543 is 34561521.

12516543 is a `hidden beast` number, since 1 + 2 + 5 + 1 + 654 + 3 = 666.

It is not a de Polignac number, because 12516543 - 2⁶ = 12516479 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12516563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 53373 + ... + 53606.

It is an arithmetic number, because the mean of its divisors is an integer number (1622530).

Almost surely, 2^12516543 is an apocalyptic number.

12516543 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

12516543 is a deficient number, since it is larger than the sum of its proper divisors (6953817).

12516543 is a wasteful number, since it uses less digits than its factorization.

12516543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106998 (or 106995 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 12516543 is about 3537.8726658827. The cubic root of 12516543 is about 232.1817776208.

The spelling of 12516543 in words is "twelve million, five hundred sixteen thousand, five hundred forty-three".