741

741 is a natural number that comes after 740 and before 742. In mathematics it is an odd composite number with prime factorization 3 × 13 × 19. Its divisors are 1, 3, 13, 19, 39, 57, 247, and 741, and it is a sphenic number because it is the product of three distinct primes. The sum of its digits is 12, yielding a digital root of 3. In Roman numerals it is written as DCCXLI; in binary it equals 1011100101 and in hexadecimal it is 0x2E5.

In electronics, 741 commonly refers to the μA741 or LM741 operational amplifier, a general-purpose op-amp introduced by Fairchild Semiconductor in 1968. The device typically comes in an 8-pin package and requires a dual supply. It is characterized by high gain and input impedance and has been widely used in analog circuits and educational settings. While modern op-amps have largely superseded the 741 for new designs, it remains a staple in legacy equipment and is frequently cited in teaching materials as a reference for op-amp concepts and fundamentals.