1234567

This number is a composite.

+ The prime factors of 1234567 (127 * 9721) form a peak-palindromic arrangement of digits (1279721). It is curious that the prime factors of 1279721 are all three emirps (79 * 97 * 167) which upon concatenation form yet another prime (7997167). [Trotter]

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

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