1704385 has 4 divisors (see below), whose sum is σ = 2045268. Its totient is φ = 1363504.

The previous prime is 1704377. The next prime is 1704397. The reversal of 1704385 is 5834071.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5834071 = 79 ⋅73849.

It can be written as a sum of positive squares in 2 ways, for example, as 535824 + 1168561 = 732^2 + 1081^2 .

It is a cyclic number.

It is not a de Polignac number, because 1704385 - 2³ = 1704377 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 170434 + ... + 170443.

It is an arithmetic number, because the mean of its divisors is an integer number (511317).

2^1704385 is an apocalyptic number.

It is an amenable number.

1704385 is a deficient number, since it is larger than the sum of its proper divisors (340883).

1704385 is an equidigital number, since it uses as much as digits as its factorization.

1704385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340882.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 1704385 is about 1305.5209688090. The cubic root of 1704385 is about 119.4508472421.

The spelling of 1704385 in words is "one million, seven hundred four thousand, three hundred eighty-five".