1,048,576
1,048,576 is 2 to the power of 20 — the number of bytes in a mebibyte.
Where 1,048,576 fits
Why 1,048,576 is special
This is the number behind the discrepancy on every storage device. Drive manufacturers count a megabyte as 1,000,000 bytes and operating systems have traditionally counted 1,048,576, so a disk sold as one terabyte reports as roughly 931 gigabytes. The units MiB and GiB were introduced to name the difference.
1,048,576 is part of
Factors & digit properties
- Divisors (21)
- 1, 2, 4, 8, 16, 32, 64, 128, 256, 512, 1024, 2048, 4096, 8192, 16384, 32768, 65536, 131072, 262144, 524288, 1048576
- Prime factorisation
- 2^20
- Digit sum
- 31
- Digital root
- 4
Representations
- Decimal
- 1048576
- Scientific notation
- 1.049 × 10^6
Roman numerals
Roman numerals as modelled here goes up to 3,999.
Binary
1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
1 × 1,048,576 + 0 × 524,288 + 0 × 262,144 + 0 × 131,072 + 0 × 65,536 + 0 × 32,768 + 0 × 16,384 + 0 × 8,192 + 0 × 4,096 + 0 × 2,048 + 0 × 1,024 + 0 × 512 + 0 × 256 + 0 × 128 + 0 × 64 + 0 × 32 + 0 × 16 + 0 × 8 + 0 × 4 + 0 × 2 + 0 × 1 = 1,048,576
Octal
4 0 0 0 0 0 0
4 × 262,144 + 0 × 32,768 + 0 × 4,096 + 0 × 512 + 0 × 64 + 0 × 8 + 0 × 1 = 1,048,576
Hexadecimal
1 0 0 0 0 0
1 × 1,048,576 + 0 × 65,536 + 0 × 4,096 + 0 × 256 + 0 × 16 + 0 × 1 = 1,048,576
In historical numeral systems
Egyptian
1 Heh figure, 4 fingers, 8 lotuses, 5 coils of rope, 7 hobbles, 6 strokes
1 × 1,000,000 + 4 × 10,000 + 8 × 1,000 + 5 × 100 + 7 × 10 + 6 × 1 = 1,048,576. 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
- Deficient number
- Powerful number
Related numbers & connections
1,024 squared. The chain from kilobyte to megabyte to gigabyte multiplies by 1,024 each time, which is why the gap from the decimal figures widens at every step.
View 1024 →2²⁰ — the number of bytes operating systems have traditionally counted as a megabyte.
Mathematically related
- is a multiple of1024
why?
Strength 0.50, confidence "high".
Numbers Around Us
- appears inPowers of two
why?
Strength 0.50, confidence "high".
Everyday life
Storage is sold in decimal units — a megabyte of 1,000,000 bytes — while operating systems have traditionally counted 1,048,576, which is 2 to the 20th. Nothing is missing from the drive; the two are counting in different bases. The units MiB and GiB exist to name the difference and are still unevenly adopted.
DocumentedEveryday life
Common questions
Is 1,048,576 a prime number?
No, 1,048,576 is not prime.
What are the factors of 1,048,576?
The factors of 1,048,576 are 1, 2, 4, 8, 16, 32, 64, 128, 256, 512, 1024, 2048, 4096, 8192, 16384, 32768, 65536, 131072, 262144, 524288, 1048576.
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