Adding to 251000 its reverse (152), we get a palindrome (251152).
It is a congruent number.
2251000 is an apocalyptic number.
251000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 251000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (294840).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
251000 is a wasteful number, since it uses less digits than its factorization.
251000 is an evil number, because the sum of its binary digits is even.
The square root of 251000 is about 500.9990019950. Note that the first 3 decimals coincide. The cubic root of 251000 is about 63.0799354866.
The spelling of 251000 in words is "two hundred fifty-one thousand".