685041271 has 16 divisors (see below), whose sum is σ = 719759520. Its totient is φ = 651456000.

The previous prime is 685041263. The next prime is 685041283. The reversal of 685041271 is 172140586.

It is a cyclic number.

It is not a de Polignac number, because 685041271 - 2³ = 685041263 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685041211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 226771 + ... + 229771.

It is an arithmetic number, because the mean of its divisors is an integer number (44984970).

Almost surely, 2^685041271 is an apocalyptic number.

685041271 is a deficient number, since it is larger than the sum of its proper divisors (34718249).

685041271 is a wasteful number, since it uses less digits than its factorization.

685041271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3186.

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 685041271 is about 26173.2930866561. The cubic root of 685041271 is about 881.5336852658.

The spelling of 685041271 in words is "six hundred eighty-five million, forty-one thousand, two hundred seventy-one".