1662604 has 6 divisors (see below), whose sum is σ = 2909564. Its totient is φ = 831300.

The previous prime is 1662593. The next prime is 1662611. The reversal of 1662604 is 4062661.

It is a happy 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 as a sum of consecutive naturals, namely, 207822 + ... + 207829.

2^1662604 is an apocalyptic number.

It is an amenable number.

1662604 is a deficient number, since it is larger than the sum of its proper divisors (1246960).

1662604 is a wasteful number, since it uses less digits than its factorization.

1662604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 415655 (or 415653 counting only the distinct ones).

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

The square root of 1662604 is about 1289.4200246623. The cubic root of 1662604 is about 118.4666952878.

The spelling of 1662604 in words is "one million, six hundred sixty-two thousand, six hundred four".