Word for word from my Gideon [King James translation] Bible:
Isaiah 14:12 How art thou fallen from heaven, O Lucifer, son of the morning! how thou art cut down to the ground, which did weaken nations!
or in a more modern rendering:
Isaiah 14:12 O how you have fallen from heaven, you shining one, son of the dawn! How you have been cut down to the earth, you who were disabling the nations. . .
These certainly may apply to Satan the Devil, but say NOTHING about him having archangel status.
Again, my question was, where did you get the idea that S. was/is an archangel? The verse you cited does not answer my question.