285117 has 8 divisors (see below), whose sum is σ = 434496. Its totient is φ = 162912.

The previous prime is 285113. The next prime is 285119. The reversal of 285117 is 711582.

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

It is not a de Polignac number, because 285117 - 2² = 285113 is a prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285113) 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, 6768 + ... + 6809.

It is an arithmetic number, because the mean of its divisors is an integer number (54312).

2²⁸⁵¹¹⁷ is an apocalyptic number.

It is an amenable number.

285117 is a deficient number, since it is larger than the sum of its proper divisors (149379).

285117 is a wasteful number, since it uses less digits than its factorization.

285117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13587.

The product of its digits is 560, while the sum is 24.

The square root of 285117 is about 533.9634818974. The cubic root of 285117 is about 65.8174477864.

Adding to 285117 its reverse (711582), we get a palindrome (996699).

The spelling of 285117 in words is "two hundred eighty-five thousand, one hundred seventeen".