2141
This number is a prime.
In a humorous old puzzle, "Professor Euclide Paracelso Bombast Umbugio of Guayazuela" predicts the end of the world for the year 2141 A.D. [Trigg]
The smallest multidigit prime such that sum of its digits equals the product of digits. [Russo]
The smallest prime that differs from its reversal by
both a square and cube. [Poo Sung]
2141 and 2273 are the first pair of consecutive Sophie
Germain primes that are both Honaker primes. [Gaydos]
The smallest Honaker prime for which the sums of the
squares of the digits of itself and its prime index (323)
are also equal. [Gaydos]
The smallest Honaker prime to contain as a digit string the
sum of the digits of the previous n Honaker primes. Note
that n = -2+14*1. [Worrom]