SOLUTION: which triangular number is this? it has three digits. it is a triangle number. it is paliindromic. the sum of its digits is prime.

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Question 250027: which triangular number is this? it has three digits. it is a triangle number. it is paliindromic. the sum of its digits is prime.
Answer by edjones(8007) About Me  (Show Source):
You can put this solution on YOUR website!
t%5Bn%5D=n%28n%2B1%29%2F2 Formula for triangular numbers.
t%5B34%5D=34%2834%2B1%29%2F2
=595
.
Ed