1685331 has 12 divisors (see below), whose sum is σ = 2449200. Its totient is φ = 1116720.

The previous prime is 1685323. The next prime is 1685381. The reversal of 1685331 is 1335861.

It is not a de Polignac number, because 1685331 - 2³ = 1685323 is a prime.

It is a super-2 number, since 2×1685331² = 5680681159122, which contains 22 as substring.

It is a plaindrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 1685295 and 1685304.

It is a congruent 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 11 ways as a sum of consecutive naturals, for example, 1321 + ... + 2261.

It is an arithmetic number, because the mean of its divisors is an integer number (204100).

2^1685331 is an apocalyptic number.

1685331 is a deficient number, since it is larger than the sum of its proper divisors (763869).

1685331 is a wasteful number, since it uses less digits than its factorization.

1685331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1146 (or 1143 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 1685331 is about 1298.2029887502. The cubic root of 1685331 is about 119.0040485406.

It can be divided in two parts, 1685 and 331, that added together give a triangular number (2016 = T₆₃).

The spelling of 1685331 in words is "one million, six hundred eighty-five thousand, three hundred thirty-one".