2465
2,465 is a Carmichael number.
- Odd
- Composite
Where 2465 fits
Why 2465 is special
The first three — 561, 1105 and 2465 — are close enough together that a naive primality test fails on all of them within a few thousand numbers. That density near the start is why the risk is real rather than theoretical.
Factors & digit properties
- Divisors (8)
- 1, 5, 17, 29, 85, 145, 493, 2465
- Prime factorisation
- 5 × 17 × 29
- Digit sum
- 17
- Digital root
- 8
Representations
- Decimal
- 2465
- Binary
- 100110100001
- Octal
- 4641
- Hexadecimal
- 9a1
- Roman numeral
- MMCDLXV
- Scientific notation
- 2.465 × 10^3
Other mathematical patterns
- Deficient number
- Harshad (Niven) number
Mathematics
561, 1,105 and 2,465 are all Carmichael numbers below 2,500. A probabilistic primality test that checks few bases will accept all three, which is why cryptographic implementations test many.
DocumentedMathematics
Common questions
Is 2465 a prime number?
No, 2465 is not prime.
What are the factors of 2465?
The factors of 2465 are 1, 5, 17, 29, 85, 145, 493, 2465.
What is 2465 in Roman numerals?
2465 in Roman numerals is MMCDLXV.
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