172 (one hundred [and] seventy-two) is the natural number following 171 and preceding 173.
In mathematics 172 is a part of a near-miss for being a counterexample to Fermat's Last Theorem, as 1353 + 1383 = 1723 − 1. This is only the third near-miss of this form, two cubes adding to one less than a third cube. It is also a "thickened cube number", half an odd cube (73 = 343) rounded up to the next integer.
See also 172 (disambiguation)
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