1153

1153 is a natural number that follows 1152 and precedes 1154. In mathematics, it is an odd prime, meaning its only positive divisors are 1 and 1153. It is not a square or a higher power. In base representations, 1153 equals 10010000001 in binary, 2201 in octal, and 0x481 in hexadecimal. In Roman numerals it is written as MCLIII.

As a calendar year, 1153 AD sits in the mid-12th century during the High Middle Ages. In England, the year is associated with the settlement of the civil war known as The Anarchy. The Treaty of Wallingford (also discussed as a settlement of the conflict) was concluded in 1153, effectively recognizing Henry Plantagenet as the heir to King Stephen, who would rule for life. Henry II, Stephen’s successor, eventually ascended to the throne in 1154, marking the beginning of the Plantagenet era.

Beyond these historical notes, 1153 does not have widely cited mathematical specializations or widely recognized scientific references that require further clarification in a general overview. It remains a prime number with a straightforward modular profile and a standard place in the sequence of integers, as well as a year noted for a significant political settlement in medieval England.