285485 has 4 divisors (see below), whose sum is σ = 342588. Its totient is φ = 228384.

The previous prime is 285473. The next prime is 285497. The reversal of 285485 is 584582.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (285473) and next prime (285497).

It can be written as a sum of positive squares in 2 ways, for example, as 42436 + 243049 = 206^2 + 493^2 .

It is a cyclic number.

It is not a de Polignac number, because 285485 - 2⁴ = 285469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 285485.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28544 + ... + 28553.

It is an arithmetic number, because the mean of its divisors is an integer number (85647).

2²⁸⁵⁴⁸⁵ is an apocalyptic number.

It is an amenable number.

285485 is a deficient number, since it is larger than the sum of its proper divisors (57103).

285485 is an equidigital number, since it uses as much as digits as its factorization.

285485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57102.

The product of its digits is 12800, while the sum is 32.

The square root of 285485 is about 534.3079636315. The cubic root of 285485 is about 65.8457524328.

The spelling of 285485 in words is "two hundred eighty-five thousand, four hundred eighty-five".