This number is a prime.
41592 - 1 is one of Ramanujan's highly composite numbers. Note that the famous Hardy-Ramanujan number (1729) is the first four digits of 41592. [Gupta]
The arithmetic mean of the two successive Mersenne primes 2^7-1 and 2^13-1. It is the largest known prime with this property. [Earls]
The first 4-digit prime to occur in the decimal expansion
of π. [Loungrides]
(There is one curio for this number that has not yet been approved by an editor.)
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