686102 has 4 divisors (see below), whose sum is σ = 1029156. Its totient is φ = 343050.

The previous prime is 686099. The next prime is 686117. The reversal of 686102 is 201686.

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

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 686102.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171524 + ... + 171527.

It is an arithmetic number, because the mean of its divisors is an integer number (257289).

2⁶⁸⁶¹⁰² is an apocalyptic number.

686102 is a deficient number, since it is larger than the sum of its proper divisors (343054).

686102 is a wasteful number, since it uses less digits than its factorization.

686102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343053.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 686102 is about 828.3127428695. The cubic root of 686102 is about 88.1988444307.

Adding to 686102 its reverse (201686), we get a palindrome (887788).

Subtracting from 686102 its reverse (201686), we obtain a square (484416 = 696²).

The spelling of 686102 in words is "six hundred eighty-six thousand, one hundred two".