1499

This number is a prime.

+ An emirp that remains prime if any digit is deleted. [Post]

+ (1499, 1511, 1523) is the first "dozen" emirp triple. (A "dozen" prime triple is a sequence consisted of three consecutive primes that differ by 12). [Loungrides]

+ There are 1499 five-digit primes that are emirps. [Goins]

+ There are exactly one thousand ones in the first 1499 positive integers. [Gaydos]

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

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