1495
1495 is the year syphilis was first recorded in Europe.
- Odd
- Composite
Where 1495 fits
Why 1495 is special
It appeared among troops besieging Naples and spread across the continent within years. Its origin — whether brought from the Americas or already present — is still debated, and each nation named it after a neighbour.
Factors & digit properties
- Divisors (8)
- 1, 5, 13, 23, 65, 115, 299, 1495
- Prime factorisation
- 5 × 13 × 23
- Digit sum
- 19
- Digital root
- 1
Representations
- Decimal
- 1495
- Binary
- 10111010111
- Octal
- 2727
- Hexadecimal
- 5d7
- Roman numeral
- MCDXCV
- Scientific notation
- 1.495 × 10^3
Other mathematical patterns
- Deficient number
- Lucky number (mathematical sieve)
Related numbers & connections
Syphilis was first recorded in Europe in 1495, three years after the first Columbus voyage. Whether it was brought from the Americas or already present is genuinely unresolved.
View 1492 →Other connections
- is associated with1492
why?
Strength 0.50, confidence "high".
Science
Syphilis appeared in Europe in 1495 and was called the French disease in Italy, the Italian disease in France, the Polish disease in Russia and the Christian disease in Turkey. Its origin is genuinely unresolved.
DocumentedScienceGeography: EuropePeriod: 1495
Common questions
Is 1495 a prime number?
No, 1495 is not prime.
What are the factors of 1495?
The factors of 1495 are 1, 5, 13, 23, 65, 115, 299, 1495.
What is 1495 in Roman numerals?
1495 in Roman numerals is MCDXCV.
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