12662543 has 2 divisors, whose sum is σ = 12662544. Its totient is φ = 12662542.

The previous prime is 12662527. The next prime is 12662549. The reversal of 12662543 is 34526621.

12662543 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (34526621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12662543 - 2⁴ = 12662527 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12662549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6331271 + 6331272.

It is an arithmetic number, because the mean of its divisors is an integer number (6331272).

Almost surely, 2^12662543 is an apocalyptic number.

12662543 is a deficient number, since it is larger than the sum of its proper divisors (1).

12662543 is an equidigital number, since it uses as much as digits as its factorization.

12662543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 29.

The square root of 12662543 is about 3558.4467116988. The cubic root of 12662543 is about 233.0810563647.

The spelling of 12662543 in words is "twelve million, six hundred sixty-two thousand, five hundred forty-three".