Hecho matemático: 1725 is a structured deltoidal hexacontahedral number.
Trivia: 1725 is an unremarkable number.
Fecha histórica: September 20th is the day in 1871 that Bishop John Coleridge Patteson is martyred on the island of Nukapu, a Polynesian outlier island now in the Temotu Province of the Solomon Islands.