250961 has 4 divisors (see below), whose sum is σ = 257124. Its totient is φ = 244800.

The previous prime is 250951. The next prime is 250963. The reversal of 250961 is 169052.

250961 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 can be written as a sum of positive squares in 2 ways, for example, as 19600 + 231361 = 140^2 + 481^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-250961 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (250963) 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, 3020 + ... + 3101.

It is an arithmetic number, because the mean of its divisors is an integer number (64281).

2²⁵⁰⁹⁶¹ is an apocalyptic number.

It is an amenable number.

250961 is a deficient number, since it is larger than the sum of its proper divisors (6163).

250961 is an equidigital number, since it uses as much as digits as its factorization.

250961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6162.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 250961 is about 500.9600782498. The cubic root of 250961 is about 63.0766682291.

The spelling of 250961 in words is "two hundred fifty thousand, nine hundred sixty-one".