1604135 has 32 divisors (see below), whose sum is σ = 2298240. Its totient is φ = 1064448.

The previous prime is 1604131. The next prime is 1604143. The reversal of 1604135 is 5314061.

It is a cyclic number.

It is not a de Polignac number, because 1604135 - 2² = 1604131 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1604131) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 43337 + ... + 43373.

It is an arithmetic number, because the mean of its divisors is an integer number (71820).

2^1604135 is an apocalyptic number.

1604135 is a deficient number, since it is larger than the sum of its proper divisors (694105).

1604135 is a wasteful number, since it uses less digits than its factorization.

1604135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 1604135 is about 1266.5445116537. The cubic root of 1604135 is about 117.0613796331.

Adding to 1604135 its reverse (5314061), we get a palindrome (6918196).

The spelling of 1604135 in words is "one million, six hundred four thousand, one hundred thirty-five".