I've just heard of them but haven't looked into them. For me spiritual stuff is just, if it effects me positively then it's good. Could be a psychological thing but I can feel it energy-wise, dunno if that makes sense. But my mind is muddy, so it can be difficult to determine what's reality and what isn't. I just know, if it impacts my capability to live life in a negative way, it's not good to me.

Just a pagan idol. It's not the real thing.

The idea of angel numbers might have come from jewish mystical number philosophy. Today it is regarded as a subject of a diverse spiritual movement that includes mystical beliefs and complex relationships to religions and weird rites. It is massively used in online commerce and print media. There is a long way from the jewish Kabbala from the Pythagorean philosophers to the Bible to the expensive online calculators that determine your personal day after you had your first sip of tea. sigh

Ask Cloud, she's the resident maths wizz!

Isn't it to do with someone dying?

It's new age woo. Take a look at this article from The Washington Post to know my opinion on this type of thing. (I haven't read it)