250891 has 4 divisors (see below), whose sum is σ = 253800. Its totient is φ = 247984.

The previous prime is 250889. The next prime is 250919. The reversal of 250891 is 198052.

250891 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 250891 - 2¹ = 250889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (250841) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1321 + ... + 1498.

It is an arithmetic number, because the mean of its divisors is an integer number (63450).

2²⁵⁰⁸⁹¹ is an apocalyptic number.

250891 is a deficient number, since it is larger than the sum of its proper divisors (2909).

250891 is an equidigital number, since it uses as much as digits as its factorization.

250891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2908.

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 250891 is about 500.8902075306. The cubic root of 250891 is about 63.0708030716.

The spelling of 250891 in words is "two hundred fifty thousand, eight hundred ninety-one".