12543523 has 2 divisors, whose sum is σ = 12543524. Its totient is φ = 12543522.

The previous prime is 12543521. The next prime is 12543529. The reversal of 12543523 is 32534521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12543523 - 2¹ = 12543521 is a prime.

Together with 12543521, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (12543521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6271761 + 6271762.

It is an arithmetic number, because the mean of its divisors is an integer number (6271762).

Almost surely, 2^12543523 is an apocalyptic number.

12543523 is a deficient number, since it is larger than the sum of its proper divisors (1).

12543523 is an equidigital number, since it uses as much as digits as its factorization.

12543523 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3600, while the sum is 25.

The square root of 12543523 is about 3541.6836391750. The cubic root of 12543523 is about 232.3484841619.

The spelling of 12543523 in words is "twelve million, five hundred forty-three thousand, five hundred twenty-three".