285207 has 16 divisors (see below), whose sum is σ = 419328. Its totient is φ = 171360.

The previous prime is 285199. The next prime is 285221. The reversal of 285207 is 702582.

It is not a de Polignac number, because 285207 - 2³ = 285199 is a prime.

It is an Ulam 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 285207.

It is not an unprimeable number, because it can be changed into a prime (285227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2718 + ... + 2820.

It is an arithmetic number, because the mean of its divisors is an integer number (26208).

2²⁸⁵²⁰⁷ is an apocalyptic number.

285207 is a deficient number, since it is larger than the sum of its proper divisors (134121).

285207 is a wasteful number, since it uses less digits than its factorization.

285207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190.

The product of its (nonzero) digits is 1120, while the sum is 24.

The square root of 285207 is about 534.0477506740. The cubic root of 285207 is about 65.8243723672.

Adding to 285207 its reverse (702582), we get a palindrome (987789).

The spelling of 285207 in words is "two hundred eighty-five thousand, two hundred seven".