The number 1289 (twelve hundred eighty-nine) is the
natural number
In mathematics, the natural numbers are the numbers 0, 1, 2, 3, and so on, possibly excluding 0. Some start counting with 0, defining the natural numbers as the non-negative integers , while others start with 1, defining them as the positive in ...
following 1288 and preceding 1290.
[
]
In mathematics
The number 1289 is an odd
prime number
A prime number (or a prime) is a natural number greater than 1 that is not a Product (mathematics), product of two smaller natural numbers. A natural number greater than 1 that is not prime is called a composite number. For example, 5 is prime ...
, following 1283 and preceding 1291.
[ It is classified as an apocalyptic power, a ]deficient number
In number theory, a deficient number or defective number is a positive integer for which the sum of divisors of is less than . Equivalently, it is a number for which the sum of proper divisors (or aliquot sum) is less than . For example, th ...
, and an evil number
In number theory, an evil number is a non-negative integer that has an even number of 1s in its binary expansion. These numbers give the positions of the zero values in the Thue–Morse sequence, and for this reason they have also been called th ...
:[
* The number 1289 is called an apocalyptic power because 21289 contains the consecutive digits 666 (in decimal), as the ]Number of the beast
The number of the beast (, ) is associated with the The Beast (Revelation), Beast of Revelation in chapter 13, verse 18 of the Book of Revelation. In most manuscripts of the New Testament and in English translations of the Bible, the number of ...
: in the sequence ..., 1281, 1285, 1286, 1289, 1290, 1298, 1301, etc.[
]
* The number 1289 is a deficient number
In number theory, a deficient number or defective number is a positive integer for which the sum of divisors of is less than . Equivalently, it is a number for which the sum of proper divisors (or aliquot sum) is less than . For example, th ...
because the sum of all its positive divisors (except itself) totals less than 1289.[ Compare with ]perfect
Perfect commonly refers to:
* Perfection; completeness, and excellence
* Perfect (grammar), a grammatical category in some languages
Perfect may also refer to:
Film and television
* ''Perfect'' (1985 film), a romantic drama
* ''Perfect'' (20 ...
and abundant number
In number theory, an abundant number or excessive number is a positive integer for which the sum of its proper divisors is greater than the number. The integer 12 is the first abundant number. Its proper divisors are 1, 2, 3, 4 and 6 for a total ...
s.
* The number 1289 is an evil number
In number theory, an evil number is a non-negative integer that has an even number of 1s in its binary expansion. These numbers give the positions of the zero values in the Thue–Morse sequence, and for this reason they have also been called th ...
because it has an even number of 1's contained in its binary expansion.[
]
In technology
* 1289 is a 4.5 volt battery
Battery or batterie most often refers to:
* Electric battery, a device that provides electrical power
* Battery (crime), a crime involving unlawful physical contact
Battery may also refer to:
Energy source
* Battery indicator, a device whic ...
with 3 "B Size" cells in flat side-by-side format with brass-strip connections, also known as MN1203, 3LR12 and many other IEC "R12" variations. Used in Rear cycle lamps, hand torches and in pairs in many Continental European Radio models.
Historical years
* 1289 AD, 1289 BC
The 1280s BC was a List of decades, decade that lasted from 1289 BC to 1280 BC.
Events and trends
*1290 BC—Seti I becomes pharaoh of New Kingdom of Egypt, Egypt. During his reign he leads his armies into Asia, asserting Egyptian imperial autho ...
.
Notes
Integers
{{Num-stub