685401 has 8 divisors (see below), whose sum is σ = 933504. Its totient is φ = 447120.

The previous prime is 685393. The next prime is 685417. The reversal of 685401 is 104586.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 685401 - 2³ = 685393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (685471) 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 7 ways as a sum of consecutive naturals, for example, 2290 + ... + 2571.

It is an arithmetic number, because the mean of its divisors is an integer number (116688).

2⁶⁸⁵⁴⁰¹ is an apocalyptic number.

It is an amenable number.

685401 is a deficient number, since it is larger than the sum of its proper divisors (248103).

685401 is a wasteful number, since it uses less digits than its factorization.

685401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4911.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 685401 is about 827.8894853783. The cubic root of 685401 is about 88.1687961975.

Adding to 685401 its reverse (104586), we get a palindrome (789987).

The spelling of 685401 in words is "six hundred eighty-five thousand, four hundred one".