285105325 has 12 divisors (see below), whose sum is σ = 357034068. Its totient is φ = 225824000.

The previous prime is 285105323. The next prime is 285105341. The reversal of 285105325 is 523501582.

It can be written as a sum of positive squares in 6 ways, for example, as 29041321 + 256064004 = 5389^2 + 16002^2 .

It is not a de Polignac number, because 285105325 - 2¹ = 285105323 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285105323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 53932 + ... + 58981.

It is an arithmetic number, because the mean of its divisors is an integer number (29752839).

Almost surely, 2^285105325 is an apocalyptic number.

285105325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

285105325 is a deficient number, since it is larger than the sum of its proper divisors (71928743).

285105325 is a wasteful number, since it uses less digits than its factorization.

285105325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113024 (or 113019 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 31.

The square root of 285105325 is about 16885.0621852571. The cubic root of 285105325 is about 658.1654940757.

The spelling of 285105325 in words is "two hundred eighty-five million, one hundred five thousand, three hundred twenty-five".