12512173 has 2 divisors, whose sum is σ = 12512174. Its totient is φ = 12512172.

The previous prime is 12512147. The next prime is 12512191. The reversal of 12512173 is 37121521.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12369289 + 142884 = 3517^2 + 378^2 .

It is an emirp because it is prime and its reverse (37121521) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12512173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12512113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6256086 + 6256087.

It is an arithmetic number, because the mean of its divisors is an integer number (6256087).

Almost surely, 2^12512173 is an apocalyptic number.

It is an amenable number.

12512173 is a deficient number, since it is larger than the sum of its proper divisors (1).

12512173 is an equidigital number, since it uses as much as digits as its factorization.

12512173 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 420, while the sum is 22.

The square root of 12512173 is about 3537.2550091844. The cubic root of 12512173 is about 232.1547533199.

Adding to 12512173 its reverse (37121521), we get a palindrome (49633694).

The spelling of 12512173 in words is "twelve million, five hundred twelve thousand, one hundred seventy-three".