1685361 has 4 divisors (see below), whose sum is σ = 2247152. Its totient is φ = 1123572.

The previous prime is 1685323. The next prime is 1685381. The reversal of 1685361 is 1635861.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1685361 - 2⁶ = 1685297 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1685381) by changing a digit.

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, 280891 + ... + 280896.

It is an arithmetic number, because the mean of its divisors is an integer number (561788).

2^1685361 is an apocalyptic number.

It is an amenable number.

1685361 is a deficient number, since it is larger than the sum of its proper divisors (561791).

1685361 is an equidigital number, since it uses as much as digits as its factorization.

1685361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 561790.

The product of its digits is 4320, while the sum is 30.

The square root of 1685361 is about 1298.2145431322. The cubic root of 1685361 is about 119.0047546531.

The spelling of 1685361 in words is "one million, six hundred eighty-five thousand, three hundred sixty-one".