It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 240 427 is not a prime number.
For example, 240 427 can be divided by 11: 240 427 / 11 = 21 857.
For 240 427 to be a prime number, it would have been required that 240 427 has only two divisors, i.e., itself and 1.
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240 427 is an odd number, because it is not evenly divisible by 2.
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A number is a perfect square (or a square number) if its square root is an integer; that is to say, it is the product of an integer with itself. Here, the square root of 240 427 is about 490.334.
Thus, the square root of 240 427 is not an integer, and therefore 240 427 is not a square number.
The square of a number (here 240 427) is the result of the product of this number (240 427) by itself (i.e., 240 427 × 240 427); the square of 240 427 is sometimes called "raising 240 427 to the power 2", or "240 427 squared".
The square of 240 427 is 57 805 142 329 because 240 427 × 240 427 = 240 4272 = 57 805 142 329.
As a consequence, 240 427 is the square root of 57 805 142 329.
The multiples of 240 427 are all integers evenly divisible by 240 427, that is all numbers such that the remainder of the division by 240 427 is zero. There are infinitely many multiples of 240 427. The smallest multiples of 240 427 are: