686061 has 12 divisors (see below), whose sum is σ = 1023360. Its totient is φ = 442440.

The previous prime is 686057. The next prime is 686087. The reversal of 686061 is 160686.

It is not a de Polignac number, because 686061 - 2² = 686057 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is an Ulam number.

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 686061.

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

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 951 + ... + 1508.

It is an arithmetic number, because the mean of its divisors is an integer number (85280).

2⁶⁸⁶⁰⁶¹ is an apocalyptic number.

It is an amenable number.

686061 is a deficient number, since it is larger than the sum of its proper divisors (337299).

686061 is a wasteful number, since it uses less digits than its factorization.

686061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2496 (or 2493 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 686061 is about 828.2879933936. The cubic root of 686061 is about 88.1970875371.

The spelling of 686061 in words is "six hundred eighty-six thousand, sixty-one".