1663204 has 6 divisors (see below), whose sum is σ = 2910614. Its totient is φ = 831600.

The previous prime is 1663183. The next prime is 1663217. The reversal of 1663204 is 4023661.

It can be written as a sum of positive squares in only one way, i.e., 906304 + 756900 = 952^2 + 870^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 207897 + ... + 207904.

2^1663204 is an apocalyptic number.

It is an amenable number.

1663204 is a deficient number, since it is larger than the sum of its proper divisors (1247410).

1663204 is a wasteful number, since it uses less digits than its factorization.

1663204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 415805 (or 415803 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 1663204 is about 1289.6526664184. The cubic root of 1663204 is about 118.4809443149.

Adding to 1663204 its reverse (4023661), we get a palindrome (5686865).

The spelling of 1663204 in words is "one million, six hundred sixty-three thousand, two hundred four".