1625
1625 is the year Grotius published On the Law of War and Peace.
- Odd
- Composite
Why 1625 is special
It argued that relations between states are governed by law derived from reason, binding even without a shared religion or ruler. Modern international law is generally traced to it.
Factors & digit properties
- Divisors (8)
- 1, 5, 13, 25, 65, 125, 325, 1625
- Prime factorisation
- 5^3 × 13
- Digit sum
- 14
- Digital root
- 5
Representations
- Decimal
- 1625
- Binary
- 11001011001
- Octal
- 3131
- Hexadecimal
- 659
- Roman numeral
- MDCXXV
- Scientific notation
- 1.625 × 10^3
Other mathematical patterns
- Deficient number
Law & regulation
Grotius argued that obligations between sovereigns could be derived from reason rather than from a shared faith or superior authority. Writing during the Thirty Years' War, that was a proposal about how the fighting might be limited.
DocumentedLaw & regulationGeography: NetherlandsPeriod: 1625
Common questions
Is 1625 a prime number?
No, 1625 is not prime.
What are the factors of 1625?
The factors of 1625 are 1, 5, 13, 25, 65, 125, 325, 1625.
What is 1625 in Roman numerals?
1625 in Roman numerals is MDCXXV.
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