1682
1682 is the year Halley observed the comet that carries his name.
- Even
- Composite
Where 1682 fits
Why 1682 is special
Halley did not discover it; he calculated that comets recorded in 1531, 1607 and 1682 were one object and predicted its return. The prediction was confirmed in 1758, sixteen years after his death.
Factors & digit properties
- Divisors (6)
- 1, 2, 29, 58, 841, 1682
- Prime factorisation
- 2 × 29^2
- Digit sum
- 17
- Digital root
- 8
Representations
- Decimal
- 1682
- Binary
- 11010010010
- Octal
- 3222
- Hexadecimal
- 692
- Roman numeral
- MDCLXXXII
- Scientific notation
- 1.682 × 10^3
Other mathematical patterns
- Deficient number
Related numbers & connections
Halley observed the comet in 1682, funded the printing of Newton's Principia in 1687, and used its gravitation to predict the comet's return. The three are one continuous piece of work.
View 1687 →Science
Halley's contribution was recognising that three separate comet sightings were one returning object, and predicting when it would come back. Its arrival in 1758 verified Newtonian gravitation on a timescale no experiment could, and Halley had been dead sixteen years.
DocumentedSciencePeriod: 1682
Common questions
Is 1682 a prime number?
No, 1682 is not prime.
What are the factors of 1682?
The factors of 1682 are 1, 2, 29, 58, 841, 1682.
What is 1682 in Roman numerals?
1682 in Roman numerals is MDCLXXXII.
About this page's data
Mathematical facts:computed directly from the number's value — nothing to source or verify externally.
Contextual records: 1 reviewer-confirmed record, sourced and reviewed before publication.
Last reviewed: 3 August 2026