320655 has 8 divisors (see below), whose sum is σ = 513072. Its totient is φ = 171008.

The previous prime is 320647. The next prime is 320657. The reversal of 320655 is 556023.

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

It is a cyclic number.

It is not a de Polignac number, because 320655 - 2³ = 320647 is a prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 320655.

It is not an unprimeable number, because it can be changed into a prime (320657) 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, 10674 + ... + 10703.

It is an arithmetic number, because the mean of its divisors is an integer number (64134).

2³²⁰⁶⁵⁵ is an apocalyptic number.

320655 is a deficient number, since it is larger than the sum of its proper divisors (192417).

320655 is a wasteful number, since it uses less digits than its factorization.

320655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21385.

The product of its (nonzero) digits is 900, while the sum is 21.

The square root of 320655 is about 566.2640726728. The cubic root of 320655 is about 68.4456741555.

Adding to 320655 its reverse (556023), we get a palindrome (876678).

The spelling of 320655 in words is "three hundred twenty thousand, six hundred fifty-five".