321560 has 16 divisors (see below), whose sum is σ = 723600. Its totient is φ = 128608.

The previous prime is 321553. The next prime is 321569. The reversal of 321560 is 65123.

321560 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321569) by changing a digit.

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, 3980 + ... + 4059.

It is an arithmetic number, because the mean of its divisors is an integer number (45225).

2³²¹⁵⁶⁰ is an apocalyptic number.

It is an amenable number.

321560 is an abundant number, since it is smaller than the sum of its proper divisors (402040).

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

321560 is a wasteful number, since it uses less digits than its factorization.

321560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8050 (or 8046 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 321560 is about 567.0626067728. The cubic root of 321560 is about 68.5100061750.

Adding to 321560 its reverse (65123), we get a palindrome (386683).

The spelling of 321560 in words is "three hundred twenty-one thousand, five hundred sixty".