1604104 has 8 divisors (see below), whose sum is σ = 3007710. Its totient is φ = 802048.

The previous prime is 1604101. The next prime is 1604111. The reversal of 1604104 is 4014061.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1512900 + 91204 = 1230^2 + 302^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (1604101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100249 + ... + 100264.

2^1604104 is an apocalyptic number.

It is an amenable number.

1604104 is a deficient number, since it is larger than the sum of its proper divisors (1403606).

1604104 is a wasteful number, since it uses less digits than its factorization.

1604104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200519 (or 200515 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 1604104 is about 1266.5322735722. The cubic root of 1604104 is about 117.0606255556.

Adding to 1604104 its reverse (4014061), we get a palindrome (5618165).

The spelling of 1604104 in words is "one million, six hundred four thousand, one hundred four".