1604128 has 12 divisors (see below), whose sum is σ = 3158190. Its totient is φ = 802048.

The previous prime is 1604123. The next prime is 1604129. The reversal of 1604128 is 8214061.

It can be written as a sum of positive squares in only one way, i.e., 944784 + 659344 = 972^2 + 812^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1604099 and 1604108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1604123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25033 + ... + 25096.

2^1604128 is an apocalyptic number.

It is an amenable number.

1604128 is a deficient number, since it is larger than the sum of its proper divisors (1554062).

1604128 is an equidigital number, since it uses as much as digits as its factorization.

1604128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50139 (or 50131 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 1604128 is about 1266.5417482262. The cubic root of 1604128 is about 117.0612093583.

Adding to 1604128 its reverse (8214061), we get a palindrome (9818189).

The spelling of 1604128 in words is "one million, six hundred four thousand, one hundred twenty-eight".