2345

2345 is a natural number that follows 2344 and precedes 2346. It is an odd, composite number with a prime factorization of 5 × 7 × 67, making it square-free.

In mathematics, 2345 has several straightforward properties. The sum of its digits is 14, so it is not divisible by 14 and thus not a Harshad number. The Euler totient function value is φ(2345) = 1584. Representations of 2345 in different bases include binary 100100101001, octal 4451, and hexadecimal 0x929.

The digits of 2345 are consecutive integers (2, 3, 4, 5), which is sometimes noted as a simple numeric pattern. Beyond pure number theory, 2345 can appear in educational examples, computer science identifiers, or cataloging and numbering schemes where a four-digit, easily recognizable sequence is useful.

As a year, 2345 would be a future date in the Gregorian calendar, situated in the 24th century. In common usage, the number serves as a reference point in discussions of arithmetic, coding, or numeral representations rather than as a symbol with specific historical events attached.