**262**= 2 x 131. It is the product of two distinct Sophie Germain primes.

The sum of the fourth powers of the prime factors of

**262**is a prime: 2^{4}+ 131^{4}= 294499937, a prime.The concatenation of the proper divisors (excluding 1 and the number itself) of

**262**is a prime: 2131 .**262**was the world's first operational jet-powered fighter aircraft.

Source: Wikipedia