285407 has 4 divisors (see below), whose sum is σ = 297840. Its totient is φ = 272976.

The previous prime is 285377. The next prime is 285421. The reversal of 285407 is 704582.

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

It is a cyclic number.

It is not a de Polignac number, because 285407 - 2⁶ = 285343 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

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 285407.

It is not an unprimeable number, because it can be changed into a prime (285457) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6182 + ... + 6227.

It is an arithmetic number, because the mean of its divisors is an integer number (74460).

2²⁸⁵⁴⁰⁷ is an apocalyptic number.

285407 is a deficient number, since it is larger than the sum of its proper divisors (12433).

285407 is a wasteful number, since it uses less digits than its factorization.

285407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12432.

The product of its (nonzero) digits is 2240, while the sum is 26.

The square root of 285407 is about 534.2349670323. The cubic root of 285407 is about 65.8397551107.

Adding to 285407 its reverse (704582), we get a palindrome (989989).

The spelling of 285407 in words is "two hundred eighty-five thousand, four hundred seven".