1606604 has 6 divisors (see below), whose sum is σ = 2811564. Its totient is φ = 803300.

The previous prime is 1606603. The next prime is 1606639. The reversal of 1606604 is 4066061.

It is a self number, because there is not a number n which added to its sum of digits gives 1606604.

It is not an unprimeable number, because it can be changed into a prime (1606603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200822 + ... + 200829.

It is an arithmetic number, because the mean of its divisors is an integer number (468594).

2^1606604 is an apocalyptic number.

It is an amenable number.

1606604 is a deficient number, since it is larger than the sum of its proper divisors (1204960).

1606604 is a wasteful number, since it uses less digits than its factorization.

1606604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401655 (or 401653 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 1606604 is about 1267.5188361520. The cubic root of 1606604 is about 117.1214070807.

The spelling of 1606604 in words is "one million, six hundred six thousand, six hundred four".