285249 has 4 divisors (see below), whose sum is σ = 380336. Its totient is φ = 190164.

The previous prime is 285227. The next prime is 285251. The reversal of 285249 is 942582.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 285249 - 2⁷ = 285121 is a prime.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is a zygodrome in base 5.

It is not an unprimeable number, because it can be changed into a prime (285289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47539 + ... + 47544.

It is an arithmetic number, because the mean of its divisors is an integer number (95084).

2²⁸⁵²⁴⁹ is an apocalyptic number.

It is an amenable number.

285249 is a deficient number, since it is larger than the sum of its proper divisors (95087).

285249 is an equidigital number, since it uses as much as digits as its factorization.

285249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95086.

The product of its digits is 5760, while the sum is 30.

The square root of 285249 is about 534.0870715529. The cubic root of 285249 is about 65.8276033397.

The spelling of 285249 in words is "two hundred eighty-five thousand, two hundred forty-nine".