The number 71 is classified as a prime number, meaning it is greater than 1 and has no positive divisors other than 1 and itself. This characteristic makes it unique among integers, as it cannot be formed by multiplying two smaller natural numbers. In the context of mathematics, prime numbers like 71 play a crucial role in number theory and are fundamental in various applications, including cryptography. The sequence of prime numbers begins with 2, 3, 5, 7, and continues with 11, 13, and so on, with 71 being the 20th prime number in this sequence.