Numberwise

1203

UN 1203 is the dangerous goods number for petrol.

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Where 1203 fits

Where 1203 fits: Mathematics, Everyday systems, Related numbersMathematics: Semiprime, Lucky number (mathematical sieve). Everyday systems: Numbers assigned as identifiers. Related numbers: 1005, 3082, 1263, 1075.MathematicsSemiprimeLucky number (mathematical …Everyday systemsNumbers assigned as identif…Related numbers10053082126310751203
1203 connects to 3 worlds: mathematics, everyday systems, related numbers.

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.

1203 is part of

Identifier numbersNumbers around us

Factors & digit properties

Divisors (4)
1, 3, 401, 1203
Prime factorisation
3 × 401
Digit sum
6
Digital root
6

Representations

Decimal
1203
Binary
10010110011
Octal
2263
Hexadecimal
4b3
Roman numeral
MCCIII
Scientific notation
1.203 × 10^3

Other mathematical patterns

Related numbers & connections

Documented appearance
UN 1203 is a dangerous goods number displayed on tanker placards so responders can identify a cargo without asking.

UN 1203 is a dangerous goods number displayed on tanker placards so responders can identify a cargo without asking.

Connection
One entry covers fire risk and the other harm to aquatic life, which is how the regulations cover damage that does not burn.

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 inNumbers assigned as identifiers
    why?

    Strength 0.50, confidence "high".

  • appears alongside1005
    why?

    Strength 0.50, confidence "high".

Other connections

  • contrasts with3082
    why?

    Strength 0.50, confidence "high".

  • is associated with1263
    why?

    Strength 0.50, confidence "high".

  • is associated with1075
    why?

    Strength 0.50, confidence "high".

How is 1203 connected to another number? →

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: 1 reviewer-confirmed record, sourced and reviewed before publication.

Last reviewed: 3 August 2026