1604885 has 16 divisors (see below), whose sum is σ = 2073600. Its totient is φ = 1188096.

The previous prime is 1604857. The next prime is 1604923. The reversal of 1604885 is 5884061.

It is not a de Polignac number, because 1604885 - 2⁶ = 1604821 is a prime.

It is a congruent number.

It is an unprimeable 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 15 ways as a sum of consecutive naturals, for example, 6596 + ... + 6834.

It is an arithmetic number, because the mean of its divisors is an integer number (129600).

2^1604885 is an apocalyptic number.

It is an amenable number.

1604885 is a deficient number, since it is larger than the sum of its proper divisors (468715).

1604885 is a wasteful number, since it uses less digits than its factorization.

1604885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340.

The product of its (nonzero) digits is 7680, while the sum is 32.

The square root of 1604885 is about 1266.8405582393. The cubic root of 1604885 is about 117.0796204826.

The spelling of 1604885 in words is "one million, six hundred four thousand, eight hundred eighty-five".