741
The 741 is the operational amplifier that made analogue design teachable.
- Odd
- Composite
Where 741 fits
Why 741 is special
Introduced in 1968, it was the first op-amp robust enough that a beginner could wire it wrongly and not destroy it. Almost every electronics course still starts with it, decades after better parts existed.
741 is part of
Factors & digit properties
- Divisors (8)
- 1, 3, 13, 19, 39, 57, 247, 741
- Prime factorisation
- 3 × 13 × 19
- Digit sum
- 12
- Digital root
- 3
Representations
- Decimal
- 741
- Scientific notation
- 7.410 × 10^2
Roman numerals
D C C X L I
DCCXLI uses the subtractive pair XL: ten before fifty — fifty minus ten.
Binary
1 0 1 1 1 0 0 1 0 1
1 × 512 + 0 × 256 + 1 × 128 + 1 × 64 + 1 × 32 + 0 × 16 + 0 × 8 + 1 × 4 + 0 × 2 + 1 × 1 = 741
Octal
1 3 4 5
1 × 512 + 3 × 64 + 4 × 8 + 5 × 1 = 741
Hexadecimal
2 e 5
2 × 256 + e × 16 + 5 × 1 = 741
Read as powers of two: 512 + 128 + 64 + 32 + 4 + 1 = 741.
In historical numeral systems
Egyptian
7 coils of rope, 4 hobbles, 1 stroke
7 × 100 + 4 × 10 + 1 × 1 = 741. The signs are simply repeated and added; where they sit on the line is a matter of layout, not value.
Babylonian
1 corner wedge + 2 vertical wedges (sixties place), 2 corner wedges + 1 vertical wedge (units place)
12 × 60 + 21 = 741. Places are separated by a space on the tablet, with the higher place written first.
Greek (Ionic)
psi, then mu, then alpha, marked as a numeral
psi-mu-alpha + keraia
psi + mu + alpha written in descending order and added — the letters carry their values wherever they stand, so this is addition, not place value.
Hebrew numerals
tav, then shin, then mem, then alef
tav-shin-mem-alef
tav (400) + shin (300) + mem (40) + alef (1) = 741, written in descending order.
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
- Triangular number
- Deficient number
- Lucky number (mathematical sieve)
Related numbers & connections
The 741 operational amplifier part number is used as a generic term for the part regardless of manufacturer.
The 741 op-amp and the 555 timer are the two chips almost every electronics course begins with, both introduced around 1970 and both still manufactured in volume.
View 555 →Technology & computing
The 741's internal protection made it survivable in the hands of students, which is why it became the teaching standard and stayed there long after superior op-amps arrived. Robustness beat performance.
DocumentedTechnology & computingPeriod: 1968
Common questions
Is 741 a prime number?
No, 741 is not prime.
What are the factors of 741?
The factors of 741 are 1, 3, 13, 19, 39, 57, 247, 741.
What is 741 in Roman numerals?
741 in Roman numerals is DCCXLI. XL is subtractive: ten before fifty — fifty minus ten. Written additively it would be DCCXXXXI, 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