1071
1071 is the year of the Battle of Manzikert.
- Odd
- Composite
Where 1071 fits
Why 1071 is special
The Byzantine defeat opened Anatolia to Turkish settlement and set in train the appeal to the west that produced the Crusades. It is among the most consequential single battles in European history.
1071 is part of
Factors & digit properties
- Divisors (12)
- 1, 3, 7, 9, 17, 21, 51, 63, 119, 153, 357, 1071
- Prime factorisation
- 3^2 × 7 × 17
- Digit sum
- 9
- Digital root
- 9
Representations
- Decimal
- 1071
- Scientific notation
- 1.071 × 10^3
Roman numerals
M L X X I
Binary
1 0 0 0 0 1 0 1 1 1 1
1 × 1,024 + 0 × 512 + 0 × 256 + 0 × 128 + 0 × 64 + 1 × 32 + 0 × 16 + 1 × 8 + 1 × 4 + 1 × 2 + 1 × 1 = 1,071
Octal
2 0 5 7
2 × 512 + 0 × 64 + 5 × 8 + 7 × 1 = 1,071
Hexadecimal
4 2 f
4 × 256 + 2 × 16 + f × 1 = 1,071
Read as powers of two: 1,024 + 32 + 8 + 4 + 2 + 1 = 1,071.
In historical numeral systems
Egyptian
1 lotus, 7 hobbles, 1 stroke
1 × 1,000 + 7 × 10 + 1 × 1 = 1,071. The signs are simply repeated and added; where they sit on the line is a matter of layout, not value.
Babylonian
1 corner wedge + 7 vertical wedges (sixties place), 5 corner wedges + 1 vertical wedge (units place)
17 × 60 + 51 = 1071. 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
- Harshad (Niven) number
Related numbers & connections
1071 is a year in the 11th century, in the 1070s.
Manzikert in 1071 cost Byzantium Anatolia, and the appeal for western help that followed produced the First Crusade in 1095.
View 1095 →Numbers Around Us
- appears inHistorical years
why?
Strength 0.50, confidence "high".
Other connections
- developed from1095
why?
Strength 0.50, confidence "high".
History
In 1071, the Byzantine defeat at Manzikert opened Anatolia to Turkish settlement (Anatolia).
DocumentedHistoryGeography: AnatoliaPeriod: 1071Manzikert in 1071 cost Byzantium control of Anatolia and led directly to the imperial appeal for western help that Urban II answered in 1095.
DocumentedHistoryGeography: AnatoliaPeriod: 1071
Common questions
Is 1071 a prime number?
No, 1071 is not prime.
What are the factors of 1071?
The factors of 1071 are 1, 3, 7, 9, 17, 21, 51, 63, 119, 153, 357, 1071.
What is 1071 in Roman numerals?
1071 in Roman numerals is MLXXI.
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