1247
1247 is a year in the 13th century. Song Ci's Washing Away of Wrongs set out systematic forensic examination of the dead, the earliest such manual known (China).
- Odd
- Composite
Where 1247 fits
Why 1247 is special
1247 has a profile because of what happened in it rather than because of any property of the number: Song Ci's Washing Away of Wrongs set out systematic forensic examination of the dead, the earliest such manual known (China).
1247 is part of
Factors & digit properties
- Divisors (4)
- 1, 29, 43, 1247
- Prime factorisation
- 29 × 43
- Digit sum
- 14
- Digital root
- 5
Representations
- Decimal
- 1247
- Scientific notation
- 1.247 × 10^3
Roman numerals
M C C X L V I I
MCCXLVII uses the subtractive pair XL: ten before fifty — fifty minus ten.
Binary
1 0 0 1 1 0 1 1 1 1 1
1 × 1,024 + 0 × 512 + 0 × 256 + 1 × 128 + 1 × 64 + 0 × 32 + 1 × 16 + 1 × 8 + 1 × 4 + 1 × 2 + 1 × 1 = 1,247
Octal
2 3 3 7
2 × 512 + 3 × 64 + 3 × 8 + 7 × 1 = 1,247
Hexadecimal
4 d f
4 × 256 + d × 16 + f × 1 = 1,247
Read as powers of two: 1,024 + 128 + 64 + 16 + 8 + 4 + 2 + 1 = 1,247.
In historical numeral systems
Egyptian
1 lotus, 2 coils of rope, 4 hobbles, 7 strokes
1 × 1,000 + 2 × 100 + 4 × 10 + 7 × 1 = 1,247. The signs are simply repeated and added; where they sit on the line is a matter of layout, not value.
Babylonian
2 corner wedges (sixties place), 4 corner wedges + 7 vertical wedges (units place)
20 × 60 + 47 = 1247. Places are separated by a space on the tablet, with the higher place written first.
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
- Deficient number
- Happy number
- Pentagonal number
- Semiprime
Related numbers & connections
1247 is a year in the 13th century, in the 1240s.
Numbers Around Us
- appears inHistorical years
why?
Strength 0.50, confidence "high".
History
In 1247, Song Ci's Washing Away of Wrongs set out systematic forensic examination of the dead, the earliest such manual known (China).
DocumentedHistoryGeography: ChinaPeriod: 1247
Common questions
Is 1247 a prime number?
No, 1247 is not prime.
What are the factors of 1247?
The factors of 1247 are 1, 29, 43, 1247.
What is 1247 in Roman numerals?
1247 in Roman numerals is MCCXLVII. XL is subtractive: ten before fifty — fifty minus ten. Written additively it would be MCCXXXXVII, which Roman inscriptions used freely — the strict subtractive form is a later convention.
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: 15 July 2026