250565 has 8 divisors (see below), whose sum is σ = 343680. Its totient is φ = 171792.

The previous prime is 250543. The next prime is 250583. The reversal of 250565 is 565052.

250565 = 288² + 289² + 290².

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 250565 - 2⁶ = 250501 is a prime.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 250565.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3545 + ... + 3614.

It is an arithmetic number, because the mean of its divisors is an integer number (42960).

2²⁵⁰⁵⁶⁵ is an apocalyptic number.

It is an amenable number.

250565 is a deficient number, since it is larger than the sum of its proper divisors (93115).

250565 is an equidigital number, since it uses as much as digits as its factorization.

250565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7171.

The product of its (nonzero) digits is 1500, while the sum is 23.

The square root of 250565 is about 500.5646811352. The cubic root of 250565 is about 63.0434738148.

The spelling of 250565 in words is "two hundred fifty thousand, five hundred sixty-five".