Math problem

Try it out! :)� �
������� This is a mathematical challenge, and it's been said that:
������� If you're an engineer, you should be able to solve it in under one minute.

                     If you're a consultant, you should be able to solve it in under one hour.

������� If you're an architect, you should be able to solve it in under three hours.
������� If you're a doctor, you should be able to solve it in under six hours.
������� If you're an accountant or banker, you should be able to solve it in under three months.
������� And if you're a lawyer, probably never.�
������� If you're good at math or logical problems, solve this challenge:
�
������� What is the next number in this logical series?
������� 1, 2, 6, 42, 1806, ____???

 

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The answer is : 3263442