904825 has 12 divisors (see below), whose sum is σ = 1188540. Its totient is φ = 680960.

The previous prime is 904823. The next prime is 904847. The reversal of 904825 is 528409.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 13689 + 891136 = 117^2 + 944^2 .

It is not a de Polignac number, because 904825 - 2¹ = 904823 is a prime.

It is a plaindrome in base 11 and base 13.

It is a junction number, because it is equal to n+sod(n) for n = 904793 and 904802.

It is not an unprimeable number, because it can be changed into a prime (904823) by changing a digit.

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, 640 + ... + 1489.

It is an arithmetic number, because the mean of its divisors is an integer number (99045).

2⁹⁰⁴⁸²⁵ is an apocalyptic number.

It is an amenable number.

904825 is a deficient number, since it is larger than the sum of its proper divisors (283715).

904825 is a wasteful number, since it uses less digits than its factorization.

904825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2156 (or 2151 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 904825 is about 951.2228971172. Note that the first 3 decimals coincide. The cubic root of 904825 is about 96.7211675754.

The spelling of 904825 in words is "nine hundred four thousand, eight hundred twenty-five".