1203
UN 1203 is the dangerous goods number for petrol.
- Odd
- Composite
Where 1203 fits
Why 1203 is special
The orange plate on the back of a road tanker carries this number, so emergency services know what they are approaching before anyone speaks to the driver.
Same number, different meanings
How 1203 is understood across different contexts — never implying one meaning because of another.
- Mathematics
The orange plate on the back of a road tanker carries this number, so emergency services know what they are approaching before anyone speaks to the driver.
- History
In 1203, the Fourth Crusade installed a claimant on the Byzantine throne, a first intervention that led to the sack (Constantinople).
- Technology & computing
UN 1203 identifies motor spirit or petrol in the United Nations dangerous goods list, displayed on transport placards alongside the hazard identification number.
1203 is part of
Factors & digit properties
- Divisors (4)
- 1, 3, 401, 1203
- Prime factorisation
- 3 × 401
- Digit sum
- 6
- Digital root
- 6
Representations
- Decimal
- 1203
- Scientific notation
- 1.203 × 10^3
Roman numerals
M C C I I I
Binary
1 0 0 1 0 1 1 0 0 1 1
1 × 1,024 + 0 × 512 + 0 × 256 + 1 × 128 + 0 × 64 + 1 × 32 + 1 × 16 + 0 × 8 + 0 × 4 + 1 × 2 + 1 × 1 = 1,203
Octal
2 2 6 3
2 × 512 + 2 × 64 + 6 × 8 + 3 × 1 = 1,203
Hexadecimal
4 b 3
4 × 256 + b × 16 + 3 × 1 = 1,203
Read as powers of two: 1,024 + 128 + 32 + 16 + 2 + 1 = 1,203.
In historical numeral systems
Egyptian
1 lotus, 2 coils of rope, 3 strokes
1 × 1,000 + 2 × 100 + 3 × 1 = 1,203. The signs are simply repeated and added; where they sit on the line is a matter of layout, not value.
Babylonian
2 corner wedges (sixties place), 3 vertical wedges (units place)
20 × 60 + 3 = 1203. 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
- Deficient number
- Semiprime
- Lucky number (mathematical sieve)
Related numbers & connections
1203 is a year in the 13th century, in the 1200s.
One entry covers fire risk and the other harm to aquatic life, which is how the regulations cover damage that does not burn.
View 3082 →Numbers Around Us
- appears inHistorical years
why?
Strength 0.50, confidence "high".
- appears inNumbers assigned as identifiers
why?
Strength 0.50, confidence "high".
- appears alongside1005
why?
Strength 0.50, confidence "high".
History
In 1203, the Fourth Crusade installed a claimant on the Byzantine throne, a first intervention that led to the sack (Constantinople).
DocumentedHistoryGeography: ConstantinoplePeriod: 1203
Technology & computing
UN 1203 identifies motor spirit or petrol in the United Nations dangerous goods list, displayed on transport placards alongside the hazard identification number.
DocumentedTechnology & computingGeography: International — UN model regulationsPeriod: 1956–
Common questions
Is 1203 a prime number?
No, 1203 is not prime.
What are the factors of 1203?
The factors of 1203 are 1, 3, 401, 1203.
What is 1203 in Roman numerals?
1203 in Roman numerals is MCCIII.
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