684135 has 24 divisors (see below), whose sum is σ = 1239264. Its totient is φ = 348480.

The previous prime is 684127. The next prime is 684157. The reversal of 684135 is 531486.

684135 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 684135 - 2³ = 684127 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 684099 and 684108.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 705 + ... + 1365.

It is an arithmetic number, because the mean of its divisors is an integer number (51636).

2⁶⁸⁴¹³⁵ is an apocalyptic number.

684135 is a deficient number, since it is larger than the sum of its proper divisors (555129).

684135 is a wasteful number, since it uses less digits than its factorization.

684135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 695 (or 692 counting only the distinct ones).

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

The square root of 684135 is about 827.1245371768. The cubic root of 684135 is about 88.1144773915.

The spelling of 684135 in words is "six hundred eighty-four thousand, one hundred thirty-five".