5645

5645 is a natural number that follows 5644 and precedes 5646. It is an odd and composite number.

In terms of prime factorization, 5645 equals 5 multiplied by 1129, where 1129 is prime. Consequently, the divisors of 5645 are 1, 5, 1129, and 5645. This makes 5645 a semiprime (the product of two primes, with two distinct factors).

Representations of 5645 include its binary and hexadecimal forms. In binary, 5645 is 1011000001101. In hexadecimal, it is 0x160D. If expressed in Roman numerals, classic notation does not have a standard single symbol for 5000; using an overline convention, 5645 could be written as V̄DCXLV, though there are variations in how 5000 is represented in different systems.

Numerical properties of 5645 include a digit sum of 20, which means it is not divisible by 3. It leaves a remainder of 2 when divided by 9 or by 11.

In a general context, 5645 may appear as an identifier, a year, or part of a sequence in mathematical or scientific datasets. As a specific integer, its most notable mathematical attribute is its status as a semiprime with prime factors 5 and 1129.