The book is now available! 142
(another Prime Pages' Curiosity)
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+ 142 is the smallest integer in which the sum of all its divisors, including itself, is equal to the product of the cubes of the first two prime numbers (142 + 71 + 2 + 1 = 216 = 23 x 33). [Cramer]

+ 142 is the smallest Semi-prime (having exactly 2 prime factors), whose sum of divisors is a cube. [Gupta]

(There is one curio for this number that has not yet been approved by an editor.)




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