285225 has 12 divisors (see below), whose sum is σ = 471696. Its totient is φ = 152080.

The previous prime is 285221. The next prime is 285227. The reversal of 285225 is 522582.

It is not a de Polignac number, because 285225 - 2² = 285221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 285195 and 285204.

It is not an unprimeable number, because it can be changed into a prime (285221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1827 + ... + 1976.

It is an arithmetic number, because the mean of its divisors is an integer number (39308).

2²⁸⁵²²⁵ is an apocalyptic number.

285225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

285225 is a deficient number, since it is larger than the sum of its proper divisors (186471).

285225 is a wasteful number, since it uses less digits than its factorization.

285225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3816 (or 3811 counting only the distinct ones).

The product of its digits is 1600, while the sum is 24.

The square root of 285225 is about 534.0646028338. The cubic root of 285225 is about 65.8257571085.

It can be divided in two parts, 28 and 5225, that added together give a triangular number (5253 = T₁₀₂).

The spelling of 285225 in words is "two hundred eighty-five thousand, two hundred twenty-five".