Well, I came up with a new idea, and (untill you guys collectively decide to kick my *** out of this thread for posting probable mess
) want to share it here.
I made a simple google search on what those enigmatical figures can be connected else to, and found that 245409 is also actual pincode (zipcode) for some area in
India. As we already know Weyland was born in India (Mumbai), and if you scroll the corporation's timeline, the first post there is about Peter's birth and the last tells about launching the project Prometheus, is there any hint to solving the riddle too? Anyway, probably, password represents something very personal from Weyland's experience, life?..
*scratches the back of her head*