841

841 is the natural number that follows 840 and precedes 842. It is an odd, composite number and the square of the prime 29, making it a perfect square. Its divisors are 1, 29, and 841.

In numeral systems, 841 is written as 1101001001 in binary and as 0x349 in hexadecimal. In Roman numerals, it is DCCCXLI.

In calendar context, the year 841 CE falls in the early ninth century, a period within the Carolingian Empire. It was a time of internal dynastic struggles among Louis the German, Lothar I, and Charles the Bald, tensions that would contribute to the eventual partition of the empire with the Treaty of Verdun a few years later in 843.