A page of the Numeropedia - the Special Encyclopedia of Numbers
[Math.] An automorphic number, whose powers end with the number itself. It is extracted from a 17-digit automorphic number 56,259,918,212,890,625, which remains automorphic when dropping the left-most digits.
[Library] ISBN-0-891051 is the International Standard Book Number for books published by the Guinness World Records. Also, ISBN-0-9652383.
[Library] ISBN-0-893115 is the International Standard Book Number for books published by Apress.
[Math.] Sum of the first 43 cube numbers:
13+23+…+423+433 = 894,916 = (1+2+…+42+43)2 = 9462.
[Math.] A pair of amicable numbers (898216, 980984), the largest pair of 6-digit numbers only.
[Math.] Two consecutive sums of consecutive numbers:
9216+…+9312 = 9313+…+9408 = 898,608.