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.
1854 is part of
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
- Scientific notation
- 1.854 × 10^3
Roman numerals
M D C C C L I V
MDCCCLIV uses the subtractive pair IV: one before five — five minus one.
Binary
1 1 1 0 0 1 1 1 1 1 0
1 × 1,024 + 1 × 512 + 1 × 256 + 0 × 128 + 0 × 64 + 1 × 32 + 1 × 16 + 1 × 8 + 1 × 4 + 1 × 2 + 0 × 1 = 1,854
Octal
3 4 7 6
3 × 512 + 4 × 64 + 7 × 8 + 6 × 1 = 1,854
Hexadecimal
7 3 e
7 × 256 + 3 × 16 + e × 1 = 1,854
Read as powers of two: 1,024 + 512 + 256 + 32 + 16 + 8 + 4 + 2 = 1,854.
In historical numeral systems
Egyptian
1 lotus, 8 coils of rope, 5 hobbles, 4 strokes
1 × 1,000 + 8 × 100 + 5 × 10 + 4 × 1 = 1,854. The signs are simply repeated and added; where they sit on the line is a matter of layout, not value.
Babylonian
3 corner wedges (sixties place), 5 corner wedges + 4 vertical wedges (units place)
30 × 60 + 54 = 1854. Places are separated by a space on the tablet, with the higher place written first.
Systems that simply cannot reach this value are left out. Where a script needs a font most readers do not have, the reading is given instead of the glyphs — see number systems for each system in full.
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: 1854In 1854, John Snow traced a cholera outbreak to a Soho water pump, a founding study of epidemiology (England).
DocumentedScienceGeography: 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. IV is subtractive: one before five — five minus one. Written additively it would be MDCCCLIIII, which Roman inscriptions used freely — the strict subtractive form is a later convention.
About this page's data
Mathematical facts:computed directly from the number's value — nothing to source or verify externally.
Contextual records: 2 reviewer-confirmed records, sourced and reviewed before publication.
Last reviewed: 15 July 2026