1664104 has 16 divisors (see below), whose sum is σ = 3360420. Its totient is φ = 768000.

The previous prime is 1664101. The next prime is 1664123. The reversal of 1664104 is 4014661.

It can be written as a sum of positive squares in 2 ways, for example, as 1664100 + 4 = 1290^2 + 2^2 .

It is not an unprimeable number, because it can be changed into a prime (1664101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7897 + ... + 8104.

2^1664104 is an apocalyptic number.

It is an amenable number.

1664104 is an abundant number, since it is smaller than the sum of its proper divisors (1696316).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1664104 is a wasteful number, since it uses less digits than its factorization.

1664104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16020 (or 16016 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 1664104 is about 1290.0015503867. The cubic root of 1664104 is about 118.5023114316.

Adding to 1664104 its reverse (4014661), we get a palindrome (5678765).

It can be divided in two parts, 1664 and 104, that multiplied together give a square (173056 = 416²).

The spelling of 1664104 in words is "one million, six hundred sixty-four thousand, one hundred four".