Pronic numbers are also called oblong numbers, rectangular numbers or heteromecic numbers.

The sum of the reciprocals of pronic numbers is 1.

Pronic numbers cannot be squares, but they can be triangular numbers. For example, 242556 = 492×493 = 696×697/2 = T₆₉₆.

The first pronic numbers are 2, 6, 12, 20, 30, 42, 56, 72, 90, 110, 132, 156, 182, 210, 240, 272, 306, 342, 380, 420, 462, 506, 552, 600 more terms

Pictorial representation of remainders (mod 2, 3, ...,11) frequency. For a table of values and more details click here

A graph displaying how many pronic numbers are multiples of the primes p from 2 to 71. In black the ideal line 1/p.