1604365 has 16 divisors (see below), whose sum is σ = 2297088. Its totient is φ = 1051776.

The previous prime is 1604359. The next prime is 1604381. The reversal of 1604365 is 5634061.

It is a cyclic number.

It is not a de Polignac number, because 1604365 - 2⁵ = 1604333 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 (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 192 + ... + 1801.

It is an arithmetic number, because the mean of its divisors is an integer number (143568).

2^1604365 is an apocalyptic number.

It is an amenable number.

1604365 is a deficient number, since it is larger than the sum of its proper divisors (692723).

1604365 is a wasteful number, since it uses less digits than its factorization.

1604365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2028.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 1604365 is about 1266.6353066293. The cubic root of 1604365 is about 117.0669740979.

The spelling of 1604365 in words is "one million, six hundred four thousand, three hundred sixty-five".