248305 has 8 divisors (see below), whose sum is σ = 303912. Its totient is φ = 194688.

The previous prime is 248299. The next prime is 248309. The reversal of 248305 is 503842.

It can be written as a sum of positive squares in 4 ways, for example, as 6241 + 242064 = 79^2 + 492^2 .

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 248305 - 2⁷ = 248177 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (248309) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 204 + ... + 733.

It is an arithmetic number, because the mean of its divisors is an integer number (37989).

2²⁴⁸³⁰⁵ is an apocalyptic number.

It is an amenable number.

248305 is a deficient number, since it is larger than the sum of its proper divisors (55607).

248305 is an equidigital number, since it uses as much as digits as its factorization.

248305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 995.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 248305 is about 498.3021171940. The cubic root of 248305 is about 62.8533584400.

The spelling of 248305 in words is "two hundred forty-eight thousand, three hundred five".