1604255 has 4 divisors (see below), whose sum is σ = 1925112. Its totient is φ = 1283400.

The previous prime is 1604243. The next prime is 1604263. The reversal of 1604255 is 5524061.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1604255 - 2⁶ = 1604191 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1604255.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 160421 + ... + 160430.

It is an arithmetic number, because the mean of its divisors is an integer number (481278).

2^1604255 is an apocalyptic number.

1604255 is a deficient number, since it is larger than the sum of its proper divisors (320857).

1604255 is an equidigital number, since it uses as much as digits as its factorization.

1604255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320856.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 1604255 is about 1266.5918837574. The cubic root of 1604255 is about 117.0642985510.

The spelling of 1604255 in words is "one million, six hundred four thousand, two hundred fifty-five".