285115 has 8 divisors (see below), whose sum is σ = 345600. Its totient is φ = 225792.

The previous prime is 285113. The next prime is 285119. The reversal of 285115 is 511582.

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 285115 - 2¹ = 285113 is a prime.

It is a plaindrome in base 16.

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, 411 + ... + 859.

It is an arithmetic number, because the mean of its divisors is an integer number (43200).

2²⁸⁵¹¹⁵ is an apocalyptic number.

285115 is a deficient number, since it is larger than the sum of its proper divisors (60485).

285115 is a wasteful number, since it uses less digits than its factorization.

285115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 581.

The product of its digits is 400, while the sum is 22.

The square root of 285115 is about 533.9616091069. The cubic root of 285115 is about 65.8172938902.

Adding to 285115 its reverse (511582), we get a palindrome (796697).

It can be divided in two parts, 285 and 115, that added together give a square (400 = 20²).

The spelling of 285115 in words is "two hundred eighty-five thousand, one hundred fifteen".