285125 has 8 divisors (see below), whose sum is σ = 355992. Its totient is φ = 228000.

The previous prime is 285121. The next prime is 285139. The reversal of 285125 is 521582.

It can be written as a sum of positive squares in 4 ways, for example, as 7396 + 277729 = 86^2 + 527^2 .

It is not a de Polignac number, because 285125 - 2² = 285121 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 5.

It is a zygodrome in base 5.

It is a self number, because there is not a number n which added to its sum of digits gives 285125.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1016 + ... + 1265.

It is an arithmetic number, because the mean of its divisors is an integer number (44499).

2²⁸⁵¹²⁵ is an apocalyptic number.

285125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

285125 is a deficient number, since it is larger than the sum of its proper divisors (70867).

285125 is an equidigital number, since it uses as much as digits as its factorization.

285125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2296 (or 2286 counting only the distinct ones).

The product of its digits is 800, while the sum is 23.

The square root of 285125 is about 533.9709729939. The cubic root of 285125 is about 65.8180633637.

The spelling of 285125 in words is "two hundred eighty-five thousand, one hundred twenty-five".