When/how is a question considered philosophical?

I have many questions within the question. Please bear with me. I am interested in your opinions on the matter.

Is it the question’s abstract nature? When you can not answer it with facts? Perhaps it’s about the interpretation of the question by the answerer(s)?

Does the answer determine if the question is philosophical?

Could I see a question as philosophical while someone else may not? If that is the case, then how do we know when a question is truly philosophical?