It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 137 402 is not a prime number.
For example, 137 402 can be divided by 2: 137 402 / 2 = 68 701.
For 137 402 to be a prime number, it would have been required that 137 402 has only two divisors, i.e., itself and 1.
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137 402 is an even number, because it is evenly divisible by 2: 137 402 / 2 = 68 701.
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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 137 402 is about 370.678.
Thus, the square root of 137 402 is not an integer, and therefore 137 402 is not a square number.
The square of a number (here 137 402) is the result of the product of this number (137 402) by itself (i.e., 137 402 × 137 402); the square of 137 402 is sometimes called "raising 137 402 to the power 2", or "137 402 squared".
The square of 137 402 is 18 879 309 604 because 137 402 × 137 402 = 137 4022 = 18 879 309 604.
As a consequence, 137 402 is the square root of 18 879 309 604.
The multiples of 137 402 are all integers evenly divisible by 137 402, that is all numbers such that the remainder of the division by 137 402 is zero. There are infinitely many multiples of 137 402. The smallest multiples of 137 402 are: