1685234 has 4 divisors (see below), whose sum is σ = 2527854. Its totient is φ = 842616.

The previous prime is 1685231. The next prime is 1685267. The reversal of 1685234 is 4325861.

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

It can be written as a sum of positive squares in only one way, i.e., 1682209 + 3025 = 1297^2 + 55^2 .

It is a plaindrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 1685197 and 1685206.

It is not an unprimeable number, because it can be changed into a prime (1685231) 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 as a sum of consecutive naturals, namely, 421307 + ... + 421310.

2^1685234 is an apocalyptic number.

1685234 is a deficient number, since it is larger than the sum of its proper divisors (842620).

1685234 is an equidigital number, since it uses as much as digits as its factorization.

1685234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 842619.

The product of its digits is 5760, while the sum is 29.

The square root of 1685234 is about 1298.1656288779. The cubic root of 1685234 is about 119.0017653859.

The spelling of 1685234 in words is "one million, six hundred eighty-five thousand, two hundred thirty-four".