685411 has 4 divisors (see below), whose sum is σ = 690552. Its totient is φ = 680272.

The previous prime is 685393. The next prime is 685417. The reversal of 685411 is 114586.

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

It is a cyclic number.

It is not a de Polignac number, because 685411 - 2¹⁹ = 161123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (685417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2365 + ... + 2638.

It is an arithmetic number, because the mean of its divisors is an integer number (172638).

2⁶⁸⁵⁴¹¹ is an apocalyptic number.

685411 is a deficient number, since it is larger than the sum of its proper divisors (5141).

685411 is a wasteful number, since it uses less digits than its factorization.

685411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5140.

The product of its digits is 960, while the sum is 25.

The square root of 685411 is about 827.8955248097. The cubic root of 685411 is about 88.1692249897.

Adding to 685411 its reverse (114586), we get a palindrome (799997).

The spelling of 685411 in words is "six hundred eighty-five thousand, four hundred eleven".