It is an Ulam number.
It is a Duffinian number.
It is a self number, because there is not a number n which added to its sum of digits gives 251375.
It is a congruent number.
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 251375.
It is an unprimeable number.
2251375 is an apocalyptic number.
251375 is a gapful number since it is divisible by the number (25) formed by its first and last digit.
251375 is an equidigital number, since it uses as much as digits as its factorization.
251375 is an evil number, because the sum of its binary digits is even.
The square root of 251375 is about 501.3731145564. The cubic root of 251375 is about 63.1113341655. Note that the first 3 decimals are identical.
The spelling of 251375 in words is "two hundred fifty-one thousand, three hundred seventy-five".