686115 has 24 divisors (see below), whose sum is σ = 1210560. Its totient is φ = 359424.

The previous prime is 686099. The next prime is 686117. The reversal of 686115 is 511686.

It is not a de Polignac number, because 686115 - 2⁴ = 686099 is a prime.

686115 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (686117) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3459 + ... + 3651.

It is an arithmetic number, because the mean of its divisors is an integer number (50440).

2⁶⁸⁶¹¹⁵ is an apocalyptic number.

686115 is a deficient number, since it is larger than the sum of its proper divisors (524445).

686115 is a wasteful number, since it uses less digits than its factorization.

686115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283 (or 280 counting only the distinct ones).

The product of its digits is 1440, while the sum is 27.

The square root of 686115 is about 828.3205901099. The cubic root of 686115 is about 88.1994014799.

The spelling of 686115 in words is "six hundred eighty-six thousand, one hundred fifteen".