12542105171 has 2 divisors, whose sum is σ = 12542105172. Its totient is φ = 12542105170.

The previous prime is 12542105117. The next prime is 12542105237. The reversal of 12542105171 is 17150124521.

Together with previous prime (12542105117) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12542105171 is a prime.

It is not a weakly prime, because it can be changed into another prime (12542105101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6271052585 + 6271052586.

It is an arithmetic number, because the mean of its divisors is an integer number (6271052586).

Almost surely, 2^12542105171 is an apocalyptic number.

12542105171 is a deficient number, since it is larger than the sum of its proper divisors (1).

12542105171 is an equidigital number, since it uses as much as digits as its factorization.

12542105171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2800, while the sum is 29.

Adding to 12542105171 its reverse (17150124521), we get a palindrome (29692229692).

The spelling of 12542105171 in words is "twelve billion, five hundred forty-two million, one hundred five thousand, one hundred seventy-one".