The number "123457" is a six-digit integer that follows a sequential pattern, with the exception of the missing digit "6." It is often used in various contexts, such as coding, mathematics, and data entry, where sequences and patterns are important. In computing, "123457" can serve as a simple example of a numeric string. It may also be used in testing scenarios to check for input validation or to demonstrate how systems handle numerical data. The absence of "6" can lead to discussions about patterns and sequences in mathematics.