1180
1180 is roughly when the windmill appeared in Europe.
- Even
- Composite
Where 1180 fits
Why 1180 is special
Unlike a watermill it could be built anywhere with wind, which freed milling from river sites and from the landowners who controlled them. The economics of grinding grain changed as much as the engineering.
Same number, different meanings
How 1180 is understood across different contexts — never implying one meaning because of another.
- Mathematics
Unlike a watermill it could be built anywhere with wind, which freed milling from river sites and from the landowners who controlled them. The economics of grinding grain changed as much as the engineering.
- History
In 1180, the Genpei War began between the Taira and Minamoto clans (Japan).
- Technology & computing
Watermills required a river and therefore a landowner's permission. Windmills could be built on any exposed ground, which broke a monopoly as much as it solved a technical problem.
1180 is part of
Factors & digit properties
- Divisors (12)
- 1, 2, 4, 5, 10, 20, 59, 118, 236, 295, 590, 1180
- Prime factorisation
- 2^2 × 5 × 59
- Digit sum
- 10
- Digital root
- 1
Representations
- Decimal
- 1180
- Scientific notation
- 1.180 × 10^3
Roman numerals
M C L X X X
Binary
1 0 0 1 0 0 1 1 1 0 0
1 × 1,024 + 0 × 512 + 0 × 256 + 1 × 128 + 0 × 64 + 0 × 32 + 1 × 16 + 1 × 8 + 1 × 4 + 0 × 2 + 0 × 1 = 1,180
Octal
2 2 3 4
2 × 512 + 2 × 64 + 3 × 8 + 4 × 1 = 1,180
Hexadecimal
4 9 c
4 × 256 + 9 × 16 + c × 1 = 1,180
Read as powers of two: 1,024 + 128 + 16 + 8 + 4 = 1,180.
In historical numeral systems
Egyptian
1 lotus, 1 coil of rope, 8 hobbles
1 × 1,000 + 1 × 100 + 8 × 10 = 1,180. The signs are simply repeated and added; where they sit on the line is a matter of layout, not value.
Babylonian
1 corner wedge + 9 vertical wedges (sixties place), 4 corner wedges (units place)
19 × 60 + 40 = 1180. Places are separated by a space on the tablet, with the higher place written first.
Systems that simply cannot reach this value are left out. Where a script needs a font most readers do not have, the reading is given instead of the glyphs — see number systems for each system in full.
Other mathematical patterns
- Abundant number
- Harshad (Niven) number
Related numbers & connections
1180 is a year in the 12th century, in the 1180s.
The horse collar from around 1050 let horses plough and the windmill from around 1180 freed milling from rivers. Both raised medieval agricultural output by removing a physical constraint.
View 1050 →Numbers Around Us
- appears inHistorical years
why?
Strength 0.50, confidence "high".
Other connections
- developed from1050
why?
Strength 0.50, confidence "high".
History
In 1180, the Genpei War began between the Taira and Minamoto clans (Japan).
DocumentedHistoryGeography: JapanPeriod: 1180
Technology & computing
Watermills required a river and therefore a landowner's permission. Windmills could be built on any exposed ground, which broke a monopoly as much as it solved a technical problem.
DocumentedTechnology & computingGeography: EuropePeriod: around 1180
Common questions
Is 1180 a prime number?
No, 1180 is not prime.
What are the factors of 1180?
The factors of 1180 are 1, 2, 4, 5, 10, 20, 59, 118, 236, 295, 590, 1180.
What is 1180 in Roman numerals?
1180 in Roman numerals is MCLXXX.
About this page's data
Mathematical facts:computed directly from the number's value — nothing to source or verify externally.
Contextual records: 2 reviewer-confirmed records, sourced and reviewed before publication.
Last reviewed: 15 July 2026