2. (8 points) This year is 2014, and 2014 is not a perfect square, but the digits can be rearranged to form a new four-digit number that is a perfect square, for example, $1024=32^{2}$. It is known that using the digits $2, 0, 1, 4$ once each, another four-digit perfect square can be formed. What is this new four-digit perfect square? $\qquad$ .