1641
1641 is the year the Grand Remonstrance was passed.
- Odd
- Composite
Where 1641 fits
Why 1641 is special
A list of parliamentary grievances against Charles I passed by eleven votes after a debate that nearly ended in swords being drawn. The Civil War began the following year.
1641 is part of
Factors & digit properties
- Divisors (4)
- 1, 3, 547, 1641
- Prime factorisation
- 3 × 547
- Digit sum
- 12
- Digital root
- 3
Representations
- Decimal
- 1641
- Scientific notation
- 1.641 × 10^3
Roman numerals
M D C X L I
MDCXLI uses the subtractive pair XL: ten before fifty — fifty minus ten.
Binary
1 1 0 0 1 1 0 1 0 0 1
1 × 1,024 + 1 × 512 + 0 × 256 + 0 × 128 + 1 × 64 + 1 × 32 + 0 × 16 + 1 × 8 + 0 × 4 + 0 × 2 + 1 × 1 = 1,641
Octal
3 1 5 1
3 × 512 + 1 × 64 + 5 × 8 + 1 × 1 = 1,641
Hexadecimal
6 6 9
6 × 256 + 6 × 16 + 9 × 1 = 1,641
Read as powers of two: 1,024 + 512 + 64 + 32 + 8 + 1 = 1,641.
In historical numeral systems
Egyptian
1 lotus, 6 coils of rope, 4 hobbles, 1 stroke
1 × 1,000 + 6 × 100 + 4 × 10 + 1 × 1 = 1,641. The signs are simply repeated and added; where they sit on the line is a matter of layout, not value.
Babylonian
2 corner wedges + 7 vertical wedges (sixties place), 2 corner wedges + 1 vertical wedge (units place)
27 × 60 + 21 = 1641. 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
- Lucky number (mathematical sieve)
Related numbers & connections
1641 is a year in the 17th century, in the 1640s.
The Grand Remonstrance passed by eleven votes in 1641 and the English Civil War began the following year.
View 1642 →Numbers Around Us
- appears inHistorical years
why?
Strength 0.50, confidence "high".
Other connections
- developed from1642
why?
Strength 0.50, confidence "high".
History
In 1641, rebellion broke out in Ireland, beginning a decade of war (Ireland).
DocumentedHistoryGeography: IrelandPeriod: 1641The Grand Remonstrance passed the Commons in 1641 by 159 to 148 after a fourteen-hour sitting. A margin of eleven separated a negotiated settlement from what followed.
DocumentedHistoryGeography: EnglandPeriod: 1641
Common questions
Is 1641 a prime number?
No, 1641 is not prime.
What are the factors of 1641?
The factors of 1641 are 1, 3, 547, 1641.
What is 1641 in Roman numerals?
1641 in Roman numerals is MDCXLI. XL is subtractive: ten before fifty — fifty minus ten. Written additively it would be MDCXXXXI, 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: 2 reviewer-confirmed records, sourced and reviewed before publication.
Last reviewed: 15 July 2026