5261
5261 Eureka is a Mars trojan.
- Odd
- Prime
Where 5261 fits
Why 5261 is special
It sits at a gravitationally stable point ahead of Mars, and its existence showed trojans are not a peculiarity of Jupiter.
5261 is part of
Factors & digit properties
- Divisors (2)
- 1, 5261
- Prime factorisation
- 5261
- Digit sum
- 14
- Digital root
- 5
Representations
- Decimal
- 5261
- Binary
- 1010010001101
- Octal
- 12215
- Hexadecimal
- 148d
- Scientific notation
- 5.261 × 10^3
Other mathematical patterns
- Deficient number
Related numbers & connections
Confirming objects at Jupiter's Lagrangian points preceded finding trojans of other planets by decades.
View 588 →Science
5261 Eureka was the first Mars trojan identified, librating about the planet's L5 Lagrangian point, demonstrating trojan populations beyond Jupiter's.
DocumentedSciencePeriod: 1990–
Common questions
Is 5261 a prime number?
Yes, 5261 is prime — it has exactly two positive divisors: 1 and itself.
What are the factors of 5261?
The factors of 5261 are 1, 5261.
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