126947

This number is a composite.

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126947 = 37 × 47 × 73 is the smaller of only two 2-sphenic numbers, formed by using the digits 1, 2, 4, 6, 7, 9 of first three 6th powers, i.e., 1 = 1^6, 64 = 2^6, 729 = 3^6. The other 2-sphenic number is 176249 = 23 × 79 × 97. [Loungrides]