It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 5 402 249 is not a prime number.
For example, 5 402 249 can be divided by 521: 5 402 249 / 521 = 10 369.
For 5 402 249 to be a prime number, it would have been required that 5 402 249 has only two divisors, i.e., itself and 1.
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5 402 249 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 5 402 249 is about 2 324.274.
Thus, the square root of 5 402 249 is not an integer, and therefore 5 402 249 is not a square number.
The square of a number (here 5 402 249) is the result of the product of this number (5 402 249) by itself (i.e., 5 402 249 × 5 402 249); the square of 5 402 249 is sometimes called "raising 5 402 249 to the power 2", or "5 402 249 squared".
The square of 5 402 249 is 29 184 294 258 001 because 5 402 249 × 5 402 249 = 5 402 2492 = 29 184 294 258 001.
As a consequence, 5 402 249 is the square root of 29 184 294 258 001.
The multiples of 5 402 249 are all integers evenly divisible by 5 402 249, that is all numbers such that the remainder of the division by 5 402 249 is zero. There are infinitely many multiples of 5 402 249. The smallest multiples of 5 402 249 are: