1503
1503 is the year Leonardo began the Mona Lisa.
- Odd
- Composite
Where 1503 fits
Why 1503 is special
He worked on it intermittently for years and never delivered it. Its modern fame dates substantially from its theft in 1911, which put it on front pages worldwide for two years.
Factors & digit properties
- Divisors (6)
- 1, 3, 9, 167, 501, 1503
- Prime factorisation
- 3^2 × 167
- Digit sum
- 9
- Digital root
- 9
Representations
- Decimal
- 1503
- Binary
- 10111011111
- Octal
- 2737
- Hexadecimal
- 5df
- Roman numeral
- MDIII
- Scientific notation
- 1.503 × 10^3
Other mathematical patterns
- Deficient number
- Harshad (Niven) number
- Lucky number (mathematical sieve)
Related numbers & connections
The Sistine ceiling was completed in 1512 and Leonardo began the Mona Lisa in 1503. Both are now among the most visited objects in the world and neither was made to be.
View 1512 →Other connections
- is associated with1512
why?
Strength 0.50, confidence "high".
Culture
The Mona Lisa was well regarded but not uniquely famous until it was stolen from the Louvre in 1911 and missing for two years. The coverage during its absence made it the best-known painting in the world.
DocumentedCultureGeography: Italy and FrancePeriod: 1503
Common questions
Is 1503 a prime number?
No, 1503 is not prime.
What are the factors of 1503?
The factors of 1503 are 1, 3, 9, 167, 501, 1503.
What is 1503 in Roman numerals?
1503 in Roman numerals is MDIII.
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