1685845 has 16 divisors (see below), whose sum is σ = 2361600. Its totient is φ = 1154832.

The previous prime is 1685837. The next prime is 1685861. The reversal of 1685845 is 5485861.

It is not a de Polignac number, because 1685845 - 2³ = 1685837 is a prime.

It is a plaindrome in base 15.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1224 + ... + 2206.

It is an arithmetic number, because the mean of its divisors is an integer number (147600).

2^1685845 is an apocalyptic number.

It is an amenable number.

1685845 is a deficient number, since it is larger than the sum of its proper divisors (675755).

1685845 is an frugal number, since it uses more digits than its factorization.

1685845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1009 (or 995 counting only the distinct ones).

The product of its digits is 38400, while the sum is 37.

The square root of 1685845 is about 1298.4009396177. The cubic root of 1685845 is about 119.0161454449.

The spelling of 1685845 in words is "one million, six hundred eighty-five thousand, eight hundred forty-five".