It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 367 421 is not a prime number.
For example, 367 421 can be divided by 17: 367 421 / 17 = 21 613.
For 367 421 to be a prime number, it would have been required that 367 421 has only two divisors, i.e., itself and 1.
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367 421 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 367 421 is about 606.153.
Thus, the square root of 367 421 is not an integer, and therefore 367 421 is not a square number.
The square of a number (here 367 421) is the result of the product of this number (367 421) by itself (i.e., 367 421 × 367 421); the square of 367 421 is sometimes called "raising 367 421 to the power 2", or "367 421 squared".
The square of 367 421 is 134 998 191 241 because 367 421 × 367 421 = 367 4212 = 134 998 191 241.
As a consequence, 367 421 is the square root of 134 998 191 241.
The multiples of 367 421 are all integers evenly divisible by 367 421, that is all numbers such that the remainder of the division by 367 421 is zero. There are infinitely many multiples of 367 421. The smallest multiples of 367 421 are: