| Number: | 172 |
| Divisor: | 1, 2, 4, 43, 86, 172 |
172 (one hundred [and] seventy-two) is the natural number following 171 and preceding 173.
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.