The word for “attractive” in Spanish is “atractivo” when referring to a masculine noun, and “atractiva” for a feminine noun. For example, you would say “Él es atractivo” when talking about a man, and “Ella es atractiva” when referring to a woman.
Spanish, like many languages, has gendered nouns, meaning that adjectives must agree in gender with the noun they describe. So, remembering these forms will help you use the word correctly in conversation.