1571
1571 is the year of the Battle of Lepanto.
- Odd
- Prime
Where 1571 fits
Why 1571 is special
It was the last major naval battle fought primarily with oared galleys, and among the largest. Cervantes fought in it and lost the use of his left hand, which he described as the proudest thing he had done.
1571 is part of
Factors & digit properties
- Divisors (2)
- 1, 1571
- Prime factorisation
- 1571
- Digit sum
- 14
- Digital root
- 5
Representations
- Decimal
- 1571
- Scientific notation
- 1.571 × 10^3
Roman numerals
M D L X X I
Binary
1 1 0 0 0 1 0 0 0 1 1
1 × 1,024 + 1 × 512 + 0 × 256 + 0 × 128 + 0 × 64 + 1 × 32 + 0 × 16 + 0 × 8 + 0 × 4 + 1 × 2 + 1 × 1 = 1,571
Octal
3 0 4 3
3 × 512 + 0 × 64 + 4 × 8 + 3 × 1 = 1,571
Hexadecimal
6 2 3
6 × 256 + 2 × 16 + 3 × 1 = 1,571
Read as powers of two: 1,024 + 512 + 32 + 2 + 1 = 1,571.
In historical numeral systems
Egyptian
1 lotus, 5 coils of rope, 7 hobbles, 1 stroke
1 × 1,000 + 5 × 100 + 7 × 10 + 1 × 1 = 1,571. The signs are simply repeated and added; where they sit on the line is a matter of layout, not value.
Babylonian
2 corner wedges + 6 vertical wedges (sixties place), 1 corner wedge + 1 vertical wedge (units place)
26 × 60 + 11 = 1571. 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
1571 is a year in the 16th century, in the 1570s.
The Great Siege of Malta in 1565 and Lepanto in 1571 both checked Ottoman expansion in the western Mediterranean within six years.
View 1565 →History
In 1571, a Holy League fleet defeated the Ottoman navy at Lepanto (Mediterranean).
DocumentedHistoryGeography: MediterraneanPeriod: 1571Lepanto in 1571 was fought by hundreds of oared galleys, a form of naval warfare that had lasted two thousand years and effectively ended with it. Sailing ships with broadside guns replaced them within a generation.
DocumentedHistoryGeography: Gulf of Patras, GreecePeriod: 1571
Common questions
Is 1571 a prime number?
Yes, 1571 is prime — it has exactly two positive divisors: 1 and itself.
What are the factors of 1571?
The factors of 1571 are 1, 1571.
What is 1571 in Roman numerals?
1571 in Roman numerals is MDLXXI.
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