250681 has 2 divisors, whose sum is σ = 250682.
Its totient is φ = 250680.
The previous prime is 250673. The next prime is 250687. The reversal of 250681 is 186052.
It is a happy number.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 210681 + 40000 = 459^2 + 200^2
It is a cyclic number.
It is not a de Polignac number, because 250681 - 23 = 250673 is a prime.
It is a super-2 number, since 2×2506812 = 125681927522, which contains 22 as substring.
It is a Chen prime.
It is not a weakly prime, because it can be changed into another prime (250687) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (11) of ones.
It is a good prime.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125340 + 125341.
It is an arithmetic number, because the mean of its divisors is an integer number (125341).
2250681 is an apocalyptic number.
It is an amenable number.
250681 is a deficient number, since it is larger than the sum of its proper divisors (1).
250681 is an equidigital number, since it uses as much as digits as its factorization.
250681 is an odious number, because the sum of its binary digits is odd.
The product of its (nonzero) digits is 480, while the sum is 22.
The square root of 250681 is about 500.6805368696.
The cubic root of 250681 is about 63.0532010509.
The spelling of 250681 in words is "two hundred fifty thousand, six hundred eighty-one".