904642 has 8 divisors (see below), whose sum is σ = 1400832. Its totient is φ = 437700.

The previous prime is 904637. The next prime is 904643. The reversal of 904642 is 246409.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (904643) by changing a digit.

904642 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 3 ways as a sum of consecutive naturals, for example, 7234 + ... + 7357.

It is an arithmetic number, because the mean of its divisors is an integer number (175104).

2⁹⁰⁴⁶⁴² is an apocalyptic number.

904642 is a deficient number, since it is larger than the sum of its proper divisors (496190).

904642 is a wasteful number, since it uses less digits than its factorization.

904642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14624.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 904642 is about 951.1267002876. The cubic root of 904642 is about 96.7146465475.

The spelling of 904642 in words is "nine hundred four thousand, six hundred forty-two".