12545042417 has 2 divisors, whose sum is σ = 12545042418. Its totient is φ = 12545042416.

The previous prime is 12545042381. The next prime is 12545042449. The reversal of 12545042417 is 71424054521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6355916176 + 6189126241 = 79724^2 + 78671^2 .

It is an emirp because it is prime and its reverse (71424054521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12545042417 - 2¹⁴ = 12545026033 is a prime.

It is not a weakly prime, because it can be changed into another prime (12545042017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6272521208 + 6272521209.

It is an arithmetic number, because the mean of its divisors is an integer number (6272521209).

Almost surely, 2^12545042417 is an apocalyptic number.

It is an amenable number.

12545042417 is a deficient number, since it is larger than the sum of its proper divisors (1).

12545042417 is an equidigital number, since it uses as much as digits as its factorization.

12545042417 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 44800, while the sum is 35.

Adding to 12545042417 its reverse (71424054521), we get a palindrome (83969096938).

The spelling of 12545042417 in words is "twelve billion, five hundred forty-five million, forty-two thousand, four hundred seventeen".