2025000000

Appears in sequences

• Numbers k such that k is a square and remains a square when its leading digit is increased by one.at n=21A067225
• Squares that remain squares when prefixed with a 4.at n=15A167038
• Powers k^m, m > 1, where k is an Achilles number that has a primorial kernel but is not a product of primorials.at n=22A389374