285415 has 8 divisors (see below), whose sum is σ = 368928. Its totient is φ = 210720.

The previous prime is 285377. The next prime is 285421. The reversal of 285415 is 514582.

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

It is not a de Polignac number, because 285415 - 2⁷ = 285287 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 285415.

It is a congruent number.

It is an unprimeable number.

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, 2131 + ... + 2260.

It is an arithmetic number, because the mean of its divisors is an integer number (46116).

2²⁸⁵⁴¹⁵ is an apocalyptic number.

285415 is a deficient number, since it is larger than the sum of its proper divisors (83513).

285415 is a wasteful number, since it uses less digits than its factorization.

285415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4409.

The product of its digits is 1600, while the sum is 25.

The square root of 285415 is about 534.2424543220. The cubic root of 285415 is about 65.8403702710.

Subtracting from 285415 its sum of digits (25), we obtain a triangular number (285390 = T₇₅₅).

Adding to 285415 its reverse (514582), we get a palindrome (799997).

The spelling of 285415 in words is "two hundred eighty-five thousand, four hundred fifteen".