681324 has 24 divisors (see below), whose sum is σ = 1817088. Its totient is φ = 194640.

The previous prime is 681311. The next prime is 681337. The reversal of 681324 is 423186.

It is a happy number.

681324 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (681311) and next prime (681337).

It is a junction number, because it is equal to n+sod(n) for n = 681294 and 681303.

It is an unprimeable number.

681324 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3972 + ... + 4139.

It is an arithmetic number, because the mean of its divisors is an integer number (75712).

2⁶⁸¹³²⁴ is an apocalyptic number.

It is an amenable number.

681324 is an abundant number, since it is smaller than the sum of its proper divisors (1135764).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

681324 is a wasteful number, since it uses less digits than its factorization.

681324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8125 (or 8123 counting only the distinct ones).

The product of its digits is 1152, while the sum is 24.

The square root of 681324 is about 825.4235276511. The cubic root of 681324 is about 87.9936290154.

The spelling of 681324 in words is "six hundred eighty-one thousand, three hundred twenty-four".