285245 has 8 divisors (see below), whose sum is σ = 346680. Its totient is φ = 225280.

The previous prime is 285227. The next prime is 285251. The reversal of 285245 is 542582.

It can be written as a sum of positive squares in 4 ways, for example, as 41209 + 244036 = 203^2 + 494^2 .

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

It is not a de Polignac number, because 285245 - 2⁸ = 284989 is a prime.

It is a Curzon number.

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, 125 + ... + 765.

It is an arithmetic number, because the mean of its divisors is an integer number (43335).

2²⁸⁵²⁴⁵ is an apocalyptic number.

It is an amenable number.

285245 is a deficient number, since it is larger than the sum of its proper divisors (61435).

285245 is an equidigital number, since it uses as much as digits as its factorization.

285245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 735.

The product of its digits is 3200, while the sum is 26.

The square root of 285245 is about 534.0833268321. The cubic root of 285245 is about 65.8272956417.

The spelling of 285245 in words is "two hundred eighty-five thousand, two hundred forty-five".