502

502 is the natural number that comes after 501 and before 503. In mathematics, it is an even composite number. Its prime factorization is 2 × 251, so the divisors are 1, 2, 251, and 502. Therefore 502 is a semiprime. The sum of its digits is 7, so it is not divisible by 3 or 9; it is not a multiple of 5 or 10.

502 is also widely known as the HTTP status code 502 Bad Gateway, which indicates that a server acting as a gateway or proxy received an invalid response from an upstream server. This can occur due to upstream server errors, misconfigured proxies, network problems, or DNS issues. Troubleshooting typically involves checking upstream services, logs, and intermediate gateways.

Area code 502 is a North American Numbering Plan code that covers central Kentucky, including Louisville. In some periods parts of its region have been reassigned or overlapped by additional area codes.

Roman numerals: 502 is written as DII.