1203 is a divisor of 204 - 1.
1203 is the smallest number n for which the concatenation n, (n + 1), (n + 2), . . . . (n + 34) is prime (A052079).
1203 is 102303 in base 4, 14303 in base 5, and 303 in base 20. It is 717 in base 13.
12032 = 1447209 and 12033 = 1740992427 have the same set of digits (A029797 and A045620).
Source: What's Special About This Number?
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