1290
1290 is a year in the 13th century. The Edict of Expulsion expelled the Jews from England, and the ban held for over three and a half centuries (England).
- Even
- Composite
Where 1290 fits
Why 1290 is special
1290 has a profile because of what happened in it rather than because of any property of the number: the Edict of Expulsion expelled the Jews from England, and the ban held for over three and a half centuries (England).
Same number, different meanings
How 1290 is understood across different contexts — never implying one meaning because of another.
- Mathematics
1290 has a profile because of what happened in it rather than because of any property of the number: the Edict of Expulsion expelled the Jews from England, and the ban held for over three and a half centuries (England).
- History
In 1290, the Edict of Expulsion expelled the Jews from England, and the ban held for over three and a half centuries (England).
- Technology & computing
In 1290, spectacles with convex lenses were in use in northern Italy, the first wearable optical correction (Italy).
1290 is part of
Factors & digit properties
- Divisors (16)
- 1, 2, 3, 5, 6, 10, 15, 30, 43, 86, 129, 215, 258, 430, 645, 1290
- Prime factorisation
- 2 × 3 × 5 × 43
- Digit sum
- 12
- Digital root
- 3
Representations
- Decimal
- 1290
- Scientific notation
- 1.290 × 10^3
Roman numerals
M C C X C
MCCXC uses the subtractive pair XC: ten before a hundred — a hundred minus ten.
Binary
1 0 1 0 0 0 0 1 0 1 0
1 × 1,024 + 0 × 512 + 1 × 256 + 0 × 128 + 0 × 64 + 0 × 32 + 0 × 16 + 1 × 8 + 0 × 4 + 1 × 2 + 0 × 1 = 1,290
Octal
2 4 1 2
2 × 512 + 4 × 64 + 1 × 8 + 2 × 1 = 1,290
Hexadecimal
5 0 a
5 × 256 + 0 × 16 + a × 1 = 1,290
Read as powers of two: 1,024 + 256 + 8 + 2 = 1,290.
In historical numeral systems
Egyptian
1 lotus, 2 coils of rope, 9 hobbles
1 × 1,000 + 2 × 100 + 9 × 10 = 1,290. The signs are simply repeated and added; where they sit on the line is a matter of layout, not value.
Babylonian
2 corner wedges + 1 vertical wedge (sixties place), 3 corner wedges (units place)
21 × 60 + 30 = 1290. 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
- Abundant number
- Happy number
Related numbers & connections
1290 is a year in the 13th century, in the 1290s.
Numbers Around Us
- appears inHistorical years
why?
Strength 0.50, confidence "high".
History
In 1290, the Edict of Expulsion expelled the Jews from England, and the ban held for over three and a half centuries (England).
DocumentedHistoryGeography: EnglandPeriod: 1290
Technology & computing
In 1290, spectacles with convex lenses were in use in northern Italy, the first wearable optical correction (Italy).
DocumentedTechnology & computingGeography: ItalyPeriod: 1290
Common questions
Is 1290 a prime number?
No, 1290 is not prime.
What are the factors of 1290?
The factors of 1290 are 1, 2, 3, 5, 6, 10, 15, 30, 43, 86, 129, 215, 258, 430, 645, 1290.
What is 1290 in Roman numerals?
1290 in Roman numerals is MCCXC. XC is subtractive: ten before a hundred — a hundred minus ten. Written additively it would be MCCLXXXX, 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