686012 has 24 divisors (see below), whose sum is σ = 1270080. Its totient is φ = 323840.

The previous prime is 686011. The next prime is 686027. The reversal of 686012 is 210686.

It is a super-2 number, since 2×686012² = 941224928288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7664 + ... + 7752.

It is an arithmetic number, because the mean of its divisors is an integer number (52920).

2⁶⁸⁶⁰¹² is an apocalyptic number.

It is an amenable number.

686012 is a deficient number, since it is larger than the sum of its proper divisors (584068).

686012 is a wasteful number, since it uses less digits than its factorization.

686012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181 (or 179 counting only the distinct ones).

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

The square root of 686012 is about 828.2584137816. The cubic root of 686012 is about 88.1949877431.

Adding to 686012 its reverse (210686), we get a palindrome (896698).

The spelling of 686012 in words is "six hundred eighty-six thousand, twelve".