25 (twenty-five) is the natural number following 24 and preceding 26. 25 is a square. It is a square number, being 5 2 = 5 × 5, and hence the third non-unitary square prime of the form p2. It is one of two two-digit numbers whose square and higher powers of the number also ends in the same last two digits, e.g., 25 2 = 625; the other is 76. More @Wikipedia
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