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.
1260 is part of
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
- Scientific notation
- 1.260 × 10^3
Roman numerals
M C C L X
Binary
1 0 0 1 1 1 0 1 1 0 0
1 × 1,024 + 0 × 512 + 0 × 256 + 1 × 128 + 1 × 64 + 1 × 32 + 0 × 16 + 1 × 8 + 1 × 4 + 0 × 2 + 0 × 1 = 1,260
Octal
2 3 5 4
2 × 512 + 3 × 64 + 5 × 8 + 4 × 1 = 1,260
Hexadecimal
4 e c
4 × 256 + e × 16 + c × 1 = 1,260
Read as powers of two: 1,024 + 128 + 64 + 32 + 8 + 4 = 1,260.
In historical numeral systems
Egyptian
1 lotus, 2 coils of rope, 6 hobbles
1 × 1,000 + 2 × 100 + 6 × 10 = 1,260. The signs are simply repeated and added; where they sit on the line is a matter of layout, not value.
Babylonian
2 corner wedges + 1 vertical wedge (sixties place), empty units place
21 × 60 + 0 = 1260. Places are separated by a space on the tablet, with the higher place written first. The second place is empty, and this is precisely the case the early system could not write unambiguously — the same wedges alone would also read as 1.
Systems that simply cannot reach this value are left out. Where a script needs a font most readers do not have, the reading is given instead of the glyphs — see number systems for each system in full.
Other mathematical patterns
- Abundant number
- Highly composite number
- Harshad (Niven) number
Related numbers & connections
1260 is a year in the 13th century, in the 1260s.
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 →Numbers Around Us
- appears inHistorical years
why?
Strength 0.50, confidence "high".
Other connections
- is associated with1250
why?
Strength 0.50, confidence "high".
History
In 1260, the Mamluk victory at Ain Jalut halted the Mongol advance westward (Levant).
DocumentedHistoryGeography: LevantPeriod: 1260Ain 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 The victory was real and the circumstances favourable, since the main Mongol army had withdrawn over a succession crisis.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: 3 reviewer-confirmed records, sourced and reviewed before publication.
Last reviewed: 15 July 2026