Yes, it is a Prime number
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257 is prime. It is only evenly divisible by itself and one.257 is prime.
257 is a prime number; its only factors are 1 and itself. The two factors of 257 are 1 and 257. There are only two factors of a prime number.The only factor pair of 257 is 1 x 257. There is only one factor pair of a prime number.The proper factors of 257 are only 1 or,if the definition you are using excludes 1, there are none.The only prime factor of 257 is 257. There is only one prime factor of a prime number - itself.The distinct prime factor of 257 is also 257, since there is no repetition of factors.The prime factorization of 257 is 257. In some cases, to emphasize that it is prime, you might write the prime factorization as 1 x 257.NOTE: There cannot be common factors, a greatest common factor, or a least common multiple because "common" refers to factors or multiples that two or more numbers have in common.
Yes, 257 is a real number.
Prime number between 196 and 289 whose digits add to 14? Possibles 239, 248, 257, 266, 275, 284. 248, 266 and 284 are multiples of 2, 275 is a multiple of 5. This leaves 239 and 257. Only 239 has one digit which is the square of another. So there you have it.
As a product of its prime factors: 2*2*2*257 = 2056