Prime Curios!: 1237

1237
(another Prime Pages' Curiosity)

Curios:

Curios Search:
Participate:

The difference between 1237² and (1237 - 5)² might surprise you.

An emirp formed from the number 12 and the 12th prime. Its reversal, 7321, is formed from the 21th prime and number 21. [Silva]

The smallest four-digit emirp with distinct digits. Note that the sum of its digits is equal to the smallest double-digit emirp. [Loungrides]

The first primeval emirp whose sum of digits is also an emirp. Note that the number of primes contained is twice its emirp sum of digits. [Beedassy]

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