285236725 has 12 divisors (see below), whose sum is σ = 360368676. Its totient is φ = 223882880.

The previous prime is 285236719. The next prime is 285236741. The reversal of 285236725 is 527632582.

It can be written as a sum of positive squares in 6 ways, for example, as 35533521 + 249703204 = 5961^2 + 15802^2 .

It is not a de Polignac number, because 285236725 - 2³ = 285236717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 106312 + ... + 108961.

It is an arithmetic number, because the mean of its divisors is an integer number (30030723).

Almost surely, 2^285236725 is an apocalyptic number.

285236725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

285236725 is a deficient number, since it is larger than the sum of its proper divisors (75131951).

285236725 is a wasteful number, since it uses less digits than its factorization.

285236725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215336 (or 215331 counting only the distinct ones).

The product of its digits is 201600, while the sum is 40.

The square root of 285236725 is about 16888.9527502448. The cubic root of 285236725 is about 658.2665908232.

The spelling of 285236725 in words is "two hundred eighty-five million, two hundred thirty-six thousand, seven hundred twenty-five".