684525 has 12 divisors (see below), whose sum is σ = 1131872. Its totient is φ = 365040.

The previous prime is 684493. The next prime is 684527. The reversal of 684525 is 525486.

It is not a de Polignac number, because 684525 - 2⁵ = 684493 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 684492 and 684501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684527) 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, 4489 + ... + 4638.

2⁶⁸⁴⁵²⁵ is an apocalyptic number.

It is an amenable number.

684525 is a deficient number, since it is larger than the sum of its proper divisors (447347).

684525 is a wasteful number, since it uses less digits than its factorization.

684525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9140 (or 9135 counting only the distinct ones).

The product of its digits is 9600, while the sum is 30.

The square root of 684525 is about 827.3602601044. The cubic root of 684525 is about 88.1312178099.

The spelling of 684525 in words is "six hundred eighty-four thousand, five hundred twenty-five".