The first few powers of 5 share a curious property — their digits can be rearranged to express their value:

25 = 52

125 = 51 + 2

625 = 56 – 2

3125 = (3 + (1 × 2))5

15625 = 56 × 125

78125 = 57 × 182

It’s conjectured that all powers of 5 have this property. But no one’s proved it yet.