15715

15715 is a natural number that lies between 15714 and 15716. In number theory, it is a composite integer with prime factorization 5 × 7 × 449, and it has eight positive divisors: 1, 5, 7, 35, 449, 2245, 3143, and 15715. The number is squarefree, as no prime factor repeats. It is odd and ends with the digit 5, which means it is divisible by 5 but not by 2 or 4. The sum of its decimal digits is 19, so it is not divisible by 3 or 9. In modular arithmetic, 15715 ≡ 0 (mod 5) and ≡ 1 (mod 9).

As a decimal numeral, 15715 does not exhibit simple repeating patterns beyond its factorization, but it serves as a representative example of a small composite with three distinct prime factors. It can be used in basic demonstrations of divisor counting, prime factorization, and modular properties in introductory mathematics.

In addition to its status as a number, 15715 may appear in practical contexts such as postal codes, catalog numbers, or identifiers in various systems. Five-digit numbers like 15715 are commonly used in the United States as ZIP codes, and they also occur as model numbers, inventory identifiers, or catalog entries in manufacturing and logistics. The numeric identity of 15715 is stable and independent of its specific contextual usage.