686025 has 18 divisors (see below), whose sum is σ = 1229150. Its totient is φ = 365760.

The previous prime is 686011. The next prime is 686027. The reversal of 686025 is 520686.

It can be written as a sum of positive squares in 3 ways, for example, as 441 + 685584 = 21^2 + 828^2 .

It is not a de Polignac number, because 686025 - 2⁴ = 686009 is a prime.

It is a Curzon number.

It is a nialpdrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 686025.

It is not an unprimeable number, because it can be changed into a prime (686027) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1300 + ... + 1749.

2⁶⁸⁶⁰²⁵ is an apocalyptic number.

It is an amenable number.

686025 is a deficient number, since it is larger than the sum of its proper divisors (543125).

686025 is a wasteful number, since it uses less digits than its factorization.

686025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3065 (or 3057 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 686025 is about 828.2662615367. The cubic root of 686025 is about 88.1955448411.

The spelling of 686025 in words is "six hundred eighty-six thousand, twenty-five".