So I wondered, and tried to google the number, one of his graphs shows a peak for '1472'. Anyone got an idea what's special about this number? And from the lon

So I wondered, and tried to google the number, one of his graphs shows a peak for '1472'. Anyone got an idea what's special about this number? And from the longer digit-sequences 292513 (#12) and 38317 (#15) and 42059 (#20). I didn't google those last two, maybe they're common US ZIP codes?