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What Am I? 2

Math brain teasers require computations to solve.

 Puzzle ID: #45394 Fun: (2.45) Difficulty: (2.09) Category: Math Submitted By: Lord_Hawk

I am a seven digit number. All of my digits are distinct and non-zero. The sum of all my digits is 29. My first digit is 2, and my last is 6. No two consecutive digits are even, no two consecutive digits are odd, and no two consecutive digits are prime.
The number also follows another interesting pattern - starting from the first digit, if the second digit is higher, then the third will be lower than the second, and the fourth higher than the third, and so on alternately. This pattern can also be inverted.

What am I?

2143856
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 -felixx- Sep 30, 2009 Quite easy... Well laid out information, simple yet requires some thought. Thanks for posting dalfamnest Oct 12, 2009 I agree. Needs a bit of thought and a pencil - and just a little bit different from others. That spells FUN! Lord_Hawk Oct 12, 2009 Thanks, thought it up while on a plane smartlilbit May 25, 2010 it was fun, i havent been challenged like that forever. RRAMMOHAN Nov 10, 2012 A simple one.