The value of m for which the scalsr product of the vector $(\overrightarrow{i}+\overrightarrow{j}+\overrightarrow{k}$ with the unit vector parallel to the sum of the vector $2\overrightarrow{i} + 4\overrightarrow{j}+5 \overrightarrow{k})$ and $ (m\overrightarrow{i}+2 \overrightarrow{j}+3 \overrightarrow{k})$ ie 1 is equal to
