Yes, ANALYTICAL is a Scrabble word!

Letter values in Scrabble US: A 1, N 1, A 1, L 1, Y 4, T 1, I 1, C 3, A 1, L 1.

Is it a valid word?

ANALYTICAL is a valid word in the official Scrabble dictionary (US), the UK Scrabble Dictionary and Words with Friends (ENABLE).

using or skilled in using analysis (i.e., separating a whole--intellectual or substantial--into its elemental parts or basic principles)
of a proposition that is necessarily true independent of fact or experience