The smallest whole number that is to be multiplied with

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The smallest whole number that is to be multiplied with 59535 to make a perfect square number is x. The sum of digits of x is

∴ 59535 = 3 × 3 × 3 × 3 × 7² × 3 × 5
= 3² × 3² × 7² × 3 × 5
∴ According to the question,
x = 3 × 5 = 15
∴ Sum of digits = 1 + 5 = 6