1604425 has 12 divisors (see below), whose sum is σ = 2059020. Its totient is φ = 1238720.

The previous prime is 1604419. The next prime is 1604437. The reversal of 1604425 is 5244061.

1604425 is nontrivially palindromic in base 4.

It can be written as a sum of positive squares in 6 ways, for example, as 76729 + 1527696 = 277^2 + 1236^2 .

It is not a de Polignac number, because 1604425 - 2⁷ = 1604297 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1604396 and 1604405.

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 in 11 ways as a sum of consecutive naturals, for example, 382 + ... + 1831.

It is an arithmetic number, because the mean of its divisors is an integer number (171585).

2^1604425 is an apocalyptic number.

It is an amenable number.

1604425 is a deficient number, since it is larger than the sum of its proper divisors (454595).

1604425 is a wasteful number, since it uses less digits than its factorization.

1604425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2252 (or 2247 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 1604425 is about 1266.6589912048. The cubic root of 1604425 is about 117.0684334356.

Adding to 1604425 its reverse (5244061), we get a palindrome (6848486).

The spelling of 1604425 in words is "one million, six hundred four thousand, four hundred twenty-five".