Finally I figure I'd better answer it, and it turns out it's my mother, which is very very weird, because she never calls me.
So what does figure mean in this context.

查看翻譯

In this sentence, it means that the person decided that it would probably be better if s/he answered the phone. There may have been some doubt, but after some consideration (figuring), the decision was made to answer the phone. I hope this helps!