1259

This number is a prime.

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The smallest emirp using the end digits of each prime digit raised to a positive nonprime power: 2¹ = 2, 3⁶ = 729, 5¹ = 5, 7⁴ = 2401. [Beedassy]

There are exactly 1259 noncrossing golygons of length thirty-two. [Beedassy]

The largest concatenate emirp abcd from Ramanujan's classic paper that included a list of fifty-four quaternary (ax² + by² + cz² + du²) "diagonal" quadratic forms representing all integers. [Beedassy]