684412 has 6 divisors (see below), whose sum is σ = 1197728. Its totient is φ = 342204.

The previous prime is 684407. The next prime is 684419. The reversal of 684412 is 214486.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85548 + ... + 85555.

2⁶⁸⁴⁴¹² is an apocalyptic number.

It is an amenable number.

684412 is a deficient number, since it is larger than the sum of its proper divisors (513316).

684412 is a wasteful number, since it uses less digits than its factorization.

684412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171107 (or 171105 counting only the distinct ones).

The product of its digits is 1536, while the sum is 25.

The square root of 684412 is about 827.2919678082. The cubic root of 684412 is about 88.1263680354.

Adding to 684412 its reverse (214486), we get a palindrome (898898).

It can be divided in two parts, 6844 and 12, that multiplied together give a palindrome (82128).

The spelling of 684412 in words is "six hundred eighty-four thousand, four hundred twelve".