1159
1159 is a year in the 12th century. A disputed papal election set Alexander III against imperial antipopes for eighteen years (Europe).
- Odd
- Composite
Where 1159 fits
Why 1159 is special
1159 has a profile because of what happened in it rather than because of any property of the number: a disputed papal election set Alexander III against imperial antipopes for eighteen years (Europe).
1159 is part of
Factors & digit properties
- Divisors (4)
- 1, 19, 61, 1159
- Prime factorisation
- 19 × 61
- Digit sum
- 16
- Digital root
- 7
Representations
- Decimal
- 1159
- Scientific notation
- 1.159 × 10^3
Roman numerals
M C L I X
MCLIX uses the subtractive pair IX: one before ten — ten minus one.
Binary
1 0 0 1 0 0 0 0 1 1 1
1 × 1,024 + 0 × 512 + 0 × 256 + 1 × 128 + 0 × 64 + 0 × 32 + 0 × 16 + 0 × 8 + 1 × 4 + 1 × 2 + 1 × 1 = 1,159
Octal
2 2 0 7
2 × 512 + 2 × 64 + 0 × 8 + 7 × 1 = 1,159
Hexadecimal
4 8 7
4 × 256 + 8 × 16 + 7 × 1 = 1,159
Read as powers of two: 1,024 + 128 + 4 + 2 + 1 = 1,159.
In historical numeral systems
Egyptian
1 lotus, 1 coil of rope, 5 hobbles, 9 strokes
1 × 1,000 + 1 × 100 + 5 × 10 + 9 × 1 = 1,159. 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), 1 corner wedge + 9 vertical wedges (units place)
19 × 60 + 19 = 1159. 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
- Semiprime
Related numbers & connections
1159 is a year in the 12th century, in the 1150s.
Numbers Around Us
- appears inHistorical years
why?
Strength 0.50, confidence "high".
History
In 1159, a disputed papal election set Alexander III against imperial antipopes for eighteen years (Europe).
DocumentedHistoryGeography: EuropePeriod: 1159
Common questions
Is 1159 a prime number?
No, 1159 is not prime.
What are the factors of 1159?
The factors of 1159 are 1, 19, 61, 1159.
What is 1159 in Roman numerals?
1159 in Roman numerals is MCLIX. IX is subtractive: one before ten — ten minus one. Written additively it would be MCLVIIII, which Roman inscriptions used freely — the strict subtractive form is a later convention.
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