1543
1543 is the year Copernicus published his heliocentric model.
- Odd
- Prime
Where 1543 fits
Why 1543 is special
He delayed publication for decades and reportedly saw the printed book on the day he died. The model was not immediately more accurate than the Earth-centred one it challenged, because Copernicus kept circular orbits — Kepler's ellipses supplied the accuracy sixty years later.
1543 is part of
Factors & digit properties
- Divisors (2)
- 1, 1543
- Prime factorisation
- 1543
- Digit sum
- 13
- Digital root
- 4
Representations
- Decimal
- 1543
- Binary
- 11000000111
- Octal
- 3007
- Hexadecimal
- 607
- Roman numeral
- MDXLIII
- Scientific notation
- 1.543 × 10^3
Other mathematical patterns
- Deficient number
- Lucky number (mathematical sieve)
Related numbers & connections
Copernicus moved the Sun to the centre and Newton explained why the arrangement holds. The 144 years between them include Kepler's ellipses, which supplied the accuracy Copernicus lacked.
View 1687 →Science
Copernicus put the Sun at the centre but kept circular orbits, so his model was no better at predicting positions than the Earth-centred one it challenged. Kepler's ellipses supplied the accuracy sixty years later, which is why the revolution took longer than the publication date suggests.
DocumentedSciencePeriod: 1543
Common questions
Is 1543 a prime number?
Yes, 1543 is prime — it has exactly two positive divisors: 1 and itself.
What are the factors of 1543?
The factors of 1543 are 1, 1543.
What is 1543 in Roman numerals?
1543 in Roman numerals is MDXLIII.
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