412

412 is a composite integer in the decimal system. Its prime factorization is 2^2 × 103, giving divisors 1, 2, 4, 103, 206, and 412. In Roman numerals it is CDXII.

In computing, HTTP status code 412, Precondition Failed, is returned when one of the request’s precondition headers (such as If-Match or If-Unmodified-Since) evaluates to false.

In telecommunications, area code 412 covers Pittsburgh and nearby communities in southwestern Pennsylvania as part of the North American Numbering Plan. It has been overlaid with additional area codes to accommodate demand.

The number also appears as the year 412 CE in the Julian calendar.