1171
1171 is a year in the 12th century. Saladin ended the Fatimid caliphate and returned Egypt to Sunni allegiance (Egypt).
- Odd
- Prime
Where 1171 fits
Why 1171 is special
1171 has a profile because of what happened in it rather than because of any property of the number: Saladin ended the Fatimid caliphate and returned Egypt to Sunni allegiance (Egypt).
1171 is part of
Factors & digit properties
- Divisors (2)
- 1, 1171
- Prime factorisation
- 1171
- Digit sum
- 10
- Digital root
- 1
Representations
- Decimal
- 1171
- Scientific notation
- 1.171 × 10^3
Roman numerals
M C L X X I
Binary
1 0 0 1 0 0 1 0 0 1 1
1 × 1,024 + 0 × 512 + 0 × 256 + 1 × 128 + 0 × 64 + 0 × 32 + 1 × 16 + 0 × 8 + 0 × 4 + 1 × 2 + 1 × 1 = 1,171
Octal
2 2 2 3
2 × 512 + 2 × 64 + 2 × 8 + 3 × 1 = 1,171
Hexadecimal
4 9 3
4 × 256 + 9 × 16 + 3 × 1 = 1,171
Read as powers of two: 1,024 + 128 + 16 + 2 + 1 = 1,171.
In historical numeral systems
Egyptian
1 lotus, 1 coil of rope, 7 hobbles, 1 stroke
1 × 1,000 + 1 × 100 + 7 × 10 + 1 × 1 = 1,171. 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), 3 corner wedges + 1 vertical wedge (units place)
19 × 60 + 31 = 1171. 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
- Deficient number
Related numbers & connections
1171 is a year in the 12th century, in the 1170s.
Numbers Around Us
- appears inHistorical years
why?
Strength 0.50, confidence "high".
History
In 1171, Saladin ended the Fatimid caliphate and returned Egypt to Sunni allegiance (Egypt).
DocumentedHistoryGeography: EgyptPeriod: 1171
Common questions
Is 1171 a prime number?
Yes, 1171 is prime — it has exactly two positive divisors: 1 and itself.
What are the factors of 1171?
The factors of 1171 are 1, 1171.
What is 1171 in Roman numerals?
1171 in Roman numerals is MCLXXI.
About this page's data
Mathematical facts:computed directly from the number's value — nothing to source or verify externally.
Contextual records: 1 reviewer-confirmed record, sourced and reviewed before publication.
Last reviewed: 15 July 2026