686625 has 16 divisors (see below), whose sum is σ = 1143168. Its totient is φ = 366000.

The previous prime is 686611. The next prime is 686639. The reversal of 686625 is 526686.

It is an interprime number because it is at equal distance from previous prime (686611) and next prime (686639).

It is not a de Polignac number, because 686625 - 2⁵ = 686593 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 686625.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 541 + ... + 1290.

It is an arithmetic number, because the mean of its divisors is an integer number (71448).

2⁶⁸⁶⁶²⁵ is an apocalyptic number.

It is an amenable number.

686625 is a deficient number, since it is larger than the sum of its proper divisors (456543).

686625 is a wasteful number, since it uses less digits than its factorization.

686625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1849 (or 1839 counting only the distinct ones).

The product of its digits is 17280, while the sum is 33.

The square root of 686625 is about 828.6283847419. The cubic root of 686625 is about 88.2212493986.

The spelling of 686625 in words is "six hundred eighty-six thousand, six hundred twenty-five".