685141 has 2 divisors, whose sum is σ = 685142. Its totient is φ = 685140.

The previous prime is 685123. The next prime is 685169. The reversal of 685141 is 141586.

685141 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 378225 + 306916 = 615^2 + 554^2 .

It is a cyclic number.

It is not a de Polignac number, because 685141 - 2⁵ = 685109 is a prime.

It is equal to p₅₅₄₄₇ and since 685141 and 55447 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (685541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342570 + 342571.

It is an arithmetic number, because the mean of its divisors is an integer number (342571).

2⁶⁸⁵¹⁴¹ is an apocalyptic number.

It is an amenable number.

685141 is a deficient number, since it is larger than the sum of its proper divisors (1).

685141 is an equidigital number, since it uses as much as digits as its factorization.

685141 is an evil number, because the sum of its binary digits is even.

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

The square root of 685141 is about 827.7324446945. The cubic root of 685141 is about 88.1576461378.

The spelling of 685141 in words is "six hundred eighty-five thousand, one hundred forty-one".