6441

6441 is a natural number that follows 6440 and precedes 6442. In the decimal system it is an odd, composite integer with the prime factorisation 3 × 19 × 113. The number is not a perfect square, nor a triangular or pentagonal number, and it does not appear as a palindrome in base‑10. In binary it is written 1100100100001, and in hexadecimal it is represented as 0x1921.

In mathematics, 6441 is occasionally noted for its representation as a product of three distinct prime numbers, a property that places it among the “3‑smooth” composites used in certain factorisation algorithms. Its divisors amount to eight, and the sum of its proper divisors is 2 106, which is well short of the number itself, classifying 6441 as a deficient integer.

Outside pure mathematics, 6441 is the numerical designation of a main‑belt asteroid. Minor planet 6441, discovered on 21 September 1992 by astronomers at the Kushiro Observatory in Japan, is a typical S‑type asteroid with an approximate diameter of 7 km and an orbital period of about 4.3 years. The asteroid received the permanent number 6441 after its orbit was sufficiently established.

The four‑digit sequence also appears in various cataloguing systems, such as postal codes in parts of the United Kingdom and identification numbers for certain industrial standards, though no single usage dominates public awareness.