1381
1381 is the year of the Peasants' Revolt in England.
- Odd
- Prime
Where 1381 fits
Why 1381 is special
Rebels took London and the king agreed to their demands in person, then revoked every concession once the leaders were dead. The poll tax that triggered it was abandoned nonetheless.
1381 is part of
Factors & digit properties
- Divisors (2)
- 1, 1381
- Prime factorisation
- 1381
- Digit sum
- 13
- Digital root
- 4
Representations
- Decimal
- 1381
- Scientific notation
- 1.381 × 10^3
Roman numerals
M C C C L X X X I
Binary
1 0 1 0 1 1 0 0 1 0 1
1 × 1,024 + 0 × 512 + 1 × 256 + 0 × 128 + 1 × 64 + 1 × 32 + 0 × 16 + 0 × 8 + 1 × 4 + 0 × 2 + 1 × 1 = 1,381
Octal
2 5 4 5
2 × 512 + 5 × 64 + 4 × 8 + 5 × 1 = 1,381
Hexadecimal
5 6 5
5 × 256 + 6 × 16 + 5 × 1 = 1,381
Read as powers of two: 1,024 + 256 + 64 + 32 + 4 + 1 = 1,381.
In historical numeral systems
Egyptian
1 lotus, 3 coils of rope, 8 hobbles, 1 stroke
1 × 1,000 + 3 × 100 + 8 × 10 + 1 × 1 = 1,381. The signs are simply repeated and added; where they sit on the line is a matter of layout, not value.
Babylonian
2 corner wedges + 3 vertical wedges (sixties place), 1 vertical wedge (units place)
23 × 60 + 1 = 1381. 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
1381 is a year in the 14th century, in the 1380s.
The Jacquerie in France in 1358 and the Peasants' Revolt in England in 1381 both followed the labour shortage the Black Death created, and both were suppressed more violently than they were conducted.
View 1358 →History
In 1381, the Peasants' Revolt reached London over the poll tax and the Statute of Labourers (England).
DocumentedHistoryGeography: EnglandPeriod: 1381Richard II met the rebels and conceded their demands, then annulled the concessions after Wat Tyler was killed. The poll tax itself was not attempted again, so the revolt failed and achieved its immediate object anyway.
DocumentedHistoryGeography: EnglandPeriod: 1381
Common questions
Is 1381 a prime number?
Yes, 1381 is prime — it has exactly two positive divisors: 1 and itself.
What are the factors of 1381?
The factors of 1381 are 1, 1381.
What is 1381 in Roman numerals?
1381 in Roman numerals is MCCCLXXXI.
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