1604235 has 8 divisors (see below), whose sum is σ = 2566800. Its totient is φ = 855584.

The previous prime is 1604231. The next prime is 1604237. The reversal of 1604235 is 5324061.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1604235 - 2² = 1604231 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1604231) 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 7 ways as a sum of consecutive naturals, for example, 53460 + ... + 53489.

It is an arithmetic number, because the mean of its divisors is an integer number (320850).

2^1604235 is an apocalyptic number.

1604235 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1604235 is a deficient number, since it is larger than the sum of its proper divisors (962565).

1604235 is a wasteful number, since it uses less digits than its factorization.

1604235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106957.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 1604235 is about 1266.5839885298. The cubic root of 1604235 is about 117.0638120748.

Adding to 1604235 its reverse (5324061), we get a palindrome (6928296).

The spelling of 1604235 in words is "one million, six hundred four thousand, two hundred thirty-five".