Cardinal: one
Numeralsystem: unary
Factorization: ∅
Ordinal: 1st, (first)
1 (one, alsocalledunit, unity, and (multiplicative) identity) isanumber, numeral, andglyph.Itrepresentsasingleentity, theunitofcountingormeasurement.Forexample, alinesegmentofunitlengthisalinesegmentoflength1.
https://en.wikipedia.org/wiki/
1_(number)
2018-4-15