9561

9561 is a natural number that follows 9560 and precedes 9562. It is an odd composite number with prime factorization 3 × 3187, where 3187 is prime. The sum of its digits is 21, so the number is divisible by 3 but not by 9. It is not a perfect square, and its approximate square root is 97.8.

In base representations, 9561 equals 10010101011001 in binary, 0x2559 in hexadecimal, and 22531 in octal. These representations reflect the same value expressed in different positional systems.

As a four-digit integer, 9561 may appear as an identifier or catalog number in various contexts, such as product codes, inventory labels, or station and route designations. However, there is no widely recognized mathematical constant or widely cited object uniquely associated with the number 9561 in standard references.

Summary:

9561 is a non-prime, non-square integer with prime factors 3 and 3187. It has standard representations in binary, hexadecimal, and octal, and it is not a Harshad number. It is primarily notable as a numeric value rather than for any special mathematical or cultural significance.