1854
1854 is the year John Snow traced a cholera outbreak to a single water pump.
- Even
- Composite
Where 1854 fits
Why 1854 is special
Mapping cases against water sources showed the disease was waterborne rather than carried by bad air. The work is the founding example of epidemiology, and it was substantially ignored at the time because the miasma theory was entrenched.
Factors & digit properties
- Divisors (12)
- 1, 2, 3, 6, 9, 18, 103, 206, 309, 618, 927, 1854
- Prime factorisation
- 2 × 3^2 × 103
- Digit sum
- 18
- Digital root
- 9
Representations
- Decimal
- 1854
- Binary
- 11100111110
- Octal
- 3476
- Hexadecimal
- 73e
- Roman numeral
- MDCCCLIV
- Scientific notation
- 1.854 × 10^3
Other mathematical patterns
- Abundant number
- Harshad (Niven) number
Related numbers & connections
Two disasters that produced methods rather than only casualties: the first systematic survey of an earthquake's effects, and the map that founded epidemiology.
View 1755 →John Snow showed cholera was waterborne in 1854 and was largely ignored; the smell of the Thames reaching parliament in 1858 produced a funded sewer system within eighteen days.
View 1858 →Science
John Snow plotted cholera deaths against water sources and showed the disease travelled in water, not air. The work is the founding example of epidemiology and was largely ignored at the time because miasma theory was too well established to displace.
DocumentedScienceGeography: London, EnglandPeriod: 1854
Common questions
Is 1854 a prime number?
No, 1854 is not prime.
What are the factors of 1854?
The factors of 1854 are 1, 2, 3, 6, 9, 18, 103, 206, 309, 618, 927, 1854.
What is 1854 in Roman numerals?
1854 in Roman numerals is MDCCCLIV.
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