101,325
101,325 pascals is one standard atmosphere, exactly.
- Odd
- Composite
Where 101,325 fits
Why 101,325 is special
It is a defined value rather than a measurement, which is why it is not round: the definition was chosen to match the pressure the older mercury-column standard already described. The same quantity appears as 1013.25 hectopascals on a weather chart and 760 millimetres of mercury on a barometer — one pressure, three numbers, each belonging to a different instrument.
101,325 is part of
Factors & digit properties
- Divisors (24)
- 1, 3, 5, 7, 15, 21, 25, 35, 75, 105, 175, 193, 525, 579, 965, 1351, 2895, 4053, 4825, 6755, 14475, 20265, 33775, 101325
- Prime factorisation
- 3 × 5^2 × 7 × 193
- Digit sum
- 12
- Digital root
- 3
Representations
- Decimal
- 101325
- Scientific notation
- 1.013 × 10^5
Roman numerals
Roman numerals as modelled here goes up to 3,999.
Binary
1 1 0 0 0 1 0 1 1 1 1 0 0 1 1 0 1
1 × 65,536 + 1 × 32,768 + 0 × 16,384 + 0 × 8,192 + 0 × 4,096 + 1 × 2,048 + 0 × 1,024 + 1 × 512 + 1 × 256 + 1 × 128 + 1 × 64 + 0 × 32 + 0 × 16 + 1 × 8 + 1 × 4 + 0 × 2 + 1 × 1 = 101,325
Octal
3 0 5 7 1 5
3 × 32,768 + 0 × 4,096 + 5 × 512 + 7 × 64 + 1 × 8 + 5 × 1 = 101,325
Hexadecimal
1 8 b c d
1 × 65,536 + 8 × 4,096 + b × 256 + c × 16 + d × 1 = 101,325
Read as powers of two: 65,536 + 32,768 + 2,048 + 512 + 256 + 128 + 64 + 8 + 4 + 1 = 101,325.
In historical numeral systems
Egyptian
1 tadpole, 1 lotus, 3 coils of rope, 2 hobbles, 5 strokes
1 × 100,000 + 1 × 1,000 + 3 × 100 + 2 × 10 + 5 × 1 = 101,325. 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
Related numbers & connections
101325 appears in Numbers in physics, the topic covering numbers that carry a documented physics fact.
Numbers Around Us
- appears inPhysics
why?
Strength 0.50, confidence "high".
Science
One standard atmosphere is 101,325 pascals (worldwide, SI). Exact by definition rather than measured. The same pressure is 1013.25 hectopascals on a weather chart and 760 millimetres of mercury on a barometer — three numbers for one defined quantity, each belonging to a different instrument.
DocumentedScienceGeography: worldwide, SI
Common questions
Is 101,325 a prime number?
No, 101,325 is not prime.
What are the factors of 101,325?
The factors of 101,325 are 1, 3, 5, 7, 15, 21, 25, 35, 75, 105, 175, 193, 525, 579, 965, 1351, 2895, 4053, 4825, 6755, 14475, 20265, 33775, 101325.
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