Not particularly.
In popular culture, the number 42 has become somewhat famous thanks to the Hitchhiker's Guide to the Galaxy book and radio series. (It's meant to represent the ultimate answer to everything; problem is, nobody's figured out the ultimate question it supposedly solves.)
The creator of the series, Douglas Adams, had admitted that the number itself was chosen as a joke, for its very ordinariness. There are no superstitions attached to it that I'm aware of.
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There is no such thing as a lucky or unlucky number. It is simply a belief that some people have.
The number 4
no. in china and japan the unlucky number is 4 because it sounds like the dead
Some superstitious people believe that 13, the 6th prime number, is unlucky.
I don't believe that there is any way to finding your 'unlucky' number, although some superstitious people might tell you certain signs of how to figure out your unlucky number.