1260
1,260 is a vampire number.
- Even
- Composite
Where 1260 fits
Why 1260 is special
It factors as 21 × 60, and those digits are exactly the digits of 1,260 rearranged. The name comes from the factors 'hiding' inside the number.
Factors & digit properties
- Divisors (36)
- 1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 30, 35, 36, 42, 45, 60, 63, 70, 84, 90, 105, 126, 140, 180, 210, 252, 315, 420, 630, 1260
- Prime factorisation
- 2^2 × 3^2 × 5 × 7
- Digit sum
- 9
- Digital root
- 9
Representations
- Decimal
- 1260
- Binary
- 10011101100
- Octal
- 2354
- Hexadecimal
- 4ec
- Roman numeral
- MCCLX
- Scientific notation
- 1.260 × 10^3
Other mathematical patterns
- Abundant number
- Highly composite number
- Harshad (Niven) number
Related numbers & connections
The Mamluks took power in Egypt in 1250 and defeated the Mongols at Ain Jalut ten years later, one of very few forces to beat them in open battle.
View 1250 →Other connections
- is associated with1250
why?
Strength 0.50, confidence "high".
History
Ain Jalut in 1260 is the point at which Mongol expansion west was halted. The victory was real and the circumstances favourable, since the main Mongol army had withdrawn over a succession crisis.
DocumentedHistoryGeography: PalestinePeriod: 1260
Mathematics
Multiplying 21 by 60 gives 1,260, and those two factors between them use exactly the digits of the answer. That is why such numbers are called vampire numbers — the factors are hidden inside the result — and why searching for them by hand is far harder than checking one.
DocumentedMathematics
Common questions
Is 1260 a prime number?
No, 1260 is not prime.
What are the factors of 1260?
The factors of 1260 are 1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 30, 35, 36, 42, 45, 60, 63, 70, 84, 90, 105, 126, 140, 180, 210, 252, 315, 420, 630, 1260.
What is 1260 in Roman numerals?
1260 in Roman numerals is MCCLX.
About this page's data
Mathematical facts:computed directly from the number's value — nothing to source or verify externally.
Contextual records: 2 reviewer-confirmed records, sourced and reviewed before publication.
Last reviewed: 3 August 2026