If 1 = 5,2 = 25,3 = 125,4 = 625,5=

If 1 = 5,2 = 25,3 = 125,4 = 625,5=

three thousand one hundred and twenty-five
Analysis:
1=5
2=5*5=25
3=5*5*5=125
4=5*5*5*5=625
5=5*5*5*5*=3125