If 8^m is 27 then what would be 4^m?

Question

An integer x is selected in such a way that

x + x^(1/2) + x^(1/4) = 276

Then what would be the sum of all digits of the number y where

y = 100000 x^(1/4) + 1000 x^(1/2) + x 

Answer 1

Answer is 125