904842 has 24 divisors (see below), whose sum is σ = 2076516. Its totient is φ = 283776.

The previous prime is 904823. The next prime is 904847. The reversal of 904842 is 248409.

It can be written as a sum of positive squares in 2 ways, for example, as 904401 + 441 = 951^2 + 21^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (904847) by changing a digit.

904842 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 11 ways as a sum of consecutive naturals, for example, 1173 + ... + 1784.

2⁹⁰⁴⁸⁴² is an apocalyptic number.

904842 is an abundant number, since it is smaller than the sum of its proper divisors (1171674).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

904842 is a wasteful number, since it uses less digits than its factorization.

904842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2982 (or 2979 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 904842 is about 951.2318329408. The cubic root of 904842 is about 96.7217733093.

The spelling of 904842 in words is "nine hundred four thousand, eight hundred forty-two".