1587
1587 is the year Mary, Queen of Scots was executed.
- Odd
- Composite
Where 1587 fits
Why 1587 is special
Elizabeth signed the warrant and then blamed its dispatch on her secretary. The execution removed the Catholic claimant and contributed directly to Spain sending the Armada the following year.
1587 is part of
Factors & digit properties
- Divisors (6)
- 1, 3, 23, 69, 529, 1587
- Prime factorisation
- 3 × 23^2
- Digit sum
- 21
- Digital root
- 3
Representations
- Decimal
- 1587
- Scientific notation
- 1.587 × 10^3
Roman numerals
M D L X X X V I I
Binary
1 1 0 0 0 1 1 0 0 1 1
1 × 1,024 + 1 × 512 + 0 × 256 + 0 × 128 + 0 × 64 + 1 × 32 + 1 × 16 + 0 × 8 + 0 × 4 + 1 × 2 + 1 × 1 = 1,587
Octal
3 0 6 3
3 × 512 + 0 × 64 + 6 × 8 + 3 × 1 = 1,587
Hexadecimal
6 3 3
6 × 256 + 3 × 16 + 3 × 1 = 1,587
Read as powers of two: 1,024 + 512 + 32 + 16 + 2 + 1 = 1,587.
In historical numeral systems
Egyptian
1 lotus, 5 coils of rope, 8 hobbles, 7 strokes
1 × 1,000 + 5 × 100 + 8 × 10 + 7 × 1 = 1,587. 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), 2 corner wedges + 7 vertical wedges (units place)
26 × 60 + 27 = 1587. 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
- Happy number
- Lucky number (mathematical sieve)
Related numbers & connections
1587 is a year in the 16th century, in the 1580s.
Mary, Queen of Scots was executed in 1587 and Spain launched the Armada the following year, citing it among its reasons.
View 1588 →History
In 1587, Mary, Queen of Scots was executed at Fotheringhay (England).
DocumentedHistoryGeography: EnglandPeriod: 1587Elizabeth I signed Mary's death warrant and afterwards insisted she had not intended it sent, imprisoning the secretary who dispatched it. The execution is among Spain's stated reasons for launching the Armada in 1588.
DocumentedHistoryGeography: England and ScotlandPeriod: 1587
Common questions
Is 1587 a prime number?
No, 1587 is not prime.
What are the factors of 1587?
The factors of 1587 are 1, 3, 23, 69, 529, 1587.
What is 1587 in Roman numerals?
1587 in Roman numerals is MDLXXXVII.
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