285625 has 10 divisors (see below), whose sum is σ = 357698. Its totient is φ = 228000.

The previous prime is 285613. The next prime is 285629. The reversal of 285625 is 526582.

It can be written as a sum of positive squares in 5 ways, for example, as 59049 + 226576 = 243^2 + 476^2 .

It is not a de Polignac number, because 285625 - 2⁷ = 285497 is a prime.

It is a Duffinian number.

285625 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 285593 and 285602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285629) by changing a digit.

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 9 ways as a sum of consecutive naturals, for example, 397 + ... + 853.

2²⁸⁵⁶²⁵ is an apocalyptic number.

285625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

285625 is a deficient number, since it is larger than the sum of its proper divisors (72073).

285625 is an frugal number, since it uses more digits than its factorization.

285625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 477 (or 462 counting only the distinct ones).

The product of its digits is 4800, while the sum is 28.

The square root of 285625 is about 534.4389581608. The cubic root of 285625 is about 65.8565141178.

The spelling of 285625 in words is "two hundred eighty-five thousand, six hundred twenty-five".