239: Outliers

Given the same numbers as we've been working with for a couple of days, along with an extra number X:

X, 12783, 12784, 12785, 12795, 12792, 12790, 12799, 12801 

How small (or large) do you feel that value of x should be to be considered an outlier?

and of course, Ben Shabad, full-time graduate student and part-time cartoon-drawing person.