1569
1569 is the year Mercator published his projection.
- Odd
- Composite
Where 1569 fits
Why 1569 is special
It preserves angles, which makes it ideal for navigation and badly distorts area, which makes it misleading as a picture of the world. Both properties follow from the same mathematics.
Factors & digit properties
- Divisors (4)
- 1, 3, 523, 1569
- Prime factorisation
- 3 × 523
- Digit sum
- 21
- Digital root
- 3
Representations
- Decimal
- 1569
- Binary
- 11000100001
- Octal
- 3041
- Hexadecimal
- 621
- Roman numeral
- MDLXIX
- Scientific notation
- 1.569 × 10^3
Other mathematical patterns
- Deficient number
- Semiprime
Related numbers & connections
Mercator devised his projection in 1569 and his posthumous 1595 collection gave English the word atlas.
View 1595 →Other connections
- is associated with1595
why?
Strength 0.50, confidence "high".
Geography
Mercator's projection keeps compass bearings straight, which is exactly what a navigator needs, at the cost of inflating land near the poles. Criticism of it as a world map is criticism of using a navigation tool for a different job.
DocumentedGeographyPeriod: 1569
Common questions
Is 1569 a prime number?
No, 1569 is not prime.
What are the factors of 1569?
The factors of 1569 are 1, 3, 523, 1569.
What is 1569 in Roman numerals?
1569 in Roman numerals is MDLXIX.
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