25,000
A single-layer Blu-ray disc holds about 25,000 megabytes.
- Even
- Composite
Where 25,000 fits
Why 25,000 is special
The gain over DVD comes from a blue laser with a shorter wavelength, which can resolve smaller pits. The colour of the light is what sets the storage limit, which is an unusually direct link between physics and a product specification.
Factors & digit properties
- Divisors (24)
- 1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 125, 200, 250, 500, 625, 1000, 1250, 2500, 3125, 5000, 6250, 12500, 25000
- Prime factorisation
- 2^3 × 5^5
- Digit sum
- 7
- Digital root
- 7
Representations
- Decimal
- 25000
- Scientific notation
- 2.500 × 10^4
Roman numerals
Roman numerals as modelled here goes up to 3,999.
Binary
1 1 0 0 0 0 1 1 0 1 0 1 0 0 0
1 × 16,384 + 1 × 8,192 + 0 × 4,096 + 0 × 2,048 + 0 × 1,024 + 0 × 512 + 1 × 256 + 1 × 128 + 0 × 64 + 1 × 32 + 0 × 16 + 1 × 8 + 0 × 4 + 0 × 2 + 0 × 1 = 25,000
Octal
6 0 6 5 0
6 × 4,096 + 0 × 512 + 6 × 64 + 5 × 8 + 0 × 1 = 25,000
Hexadecimal
6 1 a 8
6 × 4,096 + 1 × 256 + a × 16 + 8 × 1 = 25,000
Read as powers of two: 16,384 + 8,192 + 256 + 128 + 32 + 8 = 25,000.
In historical numeral systems
Egyptian
2 fingers, 5 lotuses
2 × 10,000 + 5 × 1,000 = 25,000. The signs are simply repeated and added; where they sit on the line is a matter of layout, not value.
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
- Powerful number
Related numbers & connections
Blu-ray holds roughly three times a dual-layer DVD because a blue laser's shorter wavelength resolves smaller pits. Capacity follows directly from the colour of the light.
View 8500 →Mathematically related
- is a multiple of8500
why?
Strength 0.50, confidence "high".
Technology & computing
Blu-ray stores about five times a DVD because blue light has a shorter wavelength than red and can be focused on smaller features. The naming is literal: the storage capacity follows directly from the colour of the laser.
DocumentedTechnology & computing
Common questions
Is 25,000 a prime number?
No, 25,000 is not prime.
What are the factors of 25,000?
The factors of 25,000 are 1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 125, 200, 250, 500, 625, 1000, 1250, 2500, 3125, 5000, 6250, 12500, 25000.
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