238565 has 4 divisors (see below), whose sum is σ = 286284. Its totient is φ = 190848.

The previous prime is 238547. The next prime is 238573. The reversal of 238565 is 565832.

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 51076 + 187489 = 226^2 + 433^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-238565 is a prime.

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

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23852 + ... + 23861.

It is an arithmetic number, because the mean of its divisors is an integer number (71571).

2²³⁸⁵⁶⁵ is an apocalyptic number.

It is an amenable number.

238565 is a deficient number, since it is larger than the sum of its proper divisors (47719).

238565 is an equidigital number, since it uses as much as digits as its factorization.

238565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47718.

The product of its digits is 7200, while the sum is 29.

The square root of 238565 is about 488.4311619870. The cubic root of 238565 is about 62.0205447003.

The spelling of 238565 in words is "two hundred thirty-eight thousand, five hundred sixty-five".