1674
1674 is the year Leeuwenhoek first described microorganisms.
- Even
- Composite
Where 1674 fits
Why 1674 is special
He called them animalcules and his letters to the Royal Society were met with disbelief until others replicated the observations. He ground his own lenses and never disclosed the method.
Factors & digit properties
- Divisors (16)
- 1, 2, 3, 6, 9, 18, 27, 31, 54, 62, 93, 186, 279, 558, 837, 1674
- Prime factorisation
- 2 × 3^3 × 31
- Digit sum
- 18
- Digital root
- 9
Representations
- Decimal
- 1674
- Binary
- 11010001010
- Octal
- 3212
- Hexadecimal
- 68a
- Roman numeral
- MDCLXXIV
- Scientific notation
- 1.674 × 10^3
Other mathematical patterns
- Abundant number
- Harshad (Niven) number
Related numbers & connections
Compound microscopes existed from around 1590 and produced little for decades. Leeuwenhoek's single-lens instruments from 1674 revealed microorganisms and outperformed compound designs for a century.
View 1590 →Other connections
- developed from1590
why?
Strength 0.50, confidence "high".
Science
Leeuwenhoek's single-lens microscopes outperformed compound instruments for a century and he never revealed how he made them. His observations were doubted until independently confirmed.
DocumentedScienceGeography: NetherlandsPeriod: 1674
Common questions
Is 1674 a prime number?
No, 1674 is not prime.
What are the factors of 1674?
The factors of 1674 are 1, 2, 3, 6, 9, 18, 27, 31, 54, 62, 93, 186, 279, 558, 837, 1674.
What is 1674 in Roman numerals?
1674 in Roman numerals is MDCLXXIV.
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