684052 has 12 divisors (see below), whose sum is σ = 1238580. Its totient is φ = 330176.

The previous prime is 684037. The next prime is 684053. The reversal of 684052 is 250486.

It can be written as a sum of positive squares in 2 ways, for example, as 512656 + 171396 = 716^2 + 414^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684053) by changing a digit.

684052 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2833 + ... + 3064.

It is an arithmetic number, because the mean of its divisors is an integer number (103215).

2⁶⁸⁴⁰⁵² is an apocalyptic number.

It is an amenable number.

684052 is a deficient number, since it is larger than the sum of its proper divisors (554528).

684052 is a wasteful number, since it uses less digits than its factorization.

684052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5930 (or 5928 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 684052 is about 827.0743618321. The cubic root of 684052 is about 88.1109138661.

The spelling of 684052 in words is "six hundred eighty-four thousand, fifty-two".