320587 has 8 divisors (see below), whose sum is σ = 345600. Its totient is φ = 296424.

The previous prime is 320563. The next prime is 320591. The reversal of 320587 is 785023.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-320587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320387) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 714 + ... + 1072.

It is an arithmetic number, because the mean of its divisors is an integer number (43200).

2³²⁰⁵⁸⁷ is an apocalyptic number.

320587 is a deficient number, since it is larger than the sum of its proper divisors (25013).

320587 is a wasteful number, since it uses less digits than its factorization.

320587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 320587 is about 566.2040268313. The cubic root of 320587 is about 68.4408354817.

The spelling of 320587 in words is "three hundred twenty thousand, five hundred eighty-seven".