12543529 has 2 divisors, whose sum is σ = 12543530. Its totient is φ = 12543528.

The previous prime is 12543523. The next prime is 12543551. The reversal of 12543529 is 92534521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11377129 + 1166400 = 3373^2 + 1080^2 .

It is a cyclic number.

It is not a de Polignac number, because 12543529 - 2³ = 12543521 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12543529.

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, 6271764 + 6271765.

It is an arithmetic number, because the mean of its divisors is an integer number (6271765).

Almost surely, 2^12543529 is an apocalyptic number.

It is an amenable number.

12543529 is a deficient number, since it is larger than the sum of its proper divisors (1).

12543529 is an equidigital number, since it uses as much as digits as its factorization.

12543529 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10800, while the sum is 31.

The square root of 12543529 is about 3541.6844862297. The cubic root of 12543529 is about 232.3485212087.

The spelling of 12543529 in words is "twelve million, five hundred forty-three thousand, five hundred twenty-nine".