320005 has 16 divisors (see below), whose sum is σ = 451584. Its totient is φ = 213120.

The previous prime is 319993. The next prime is 320009. The reversal of 320005 is 500023.

It is not a de Polignac number, because 320005 - 2⁵ = 319973 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 319973 and 320000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320009) 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 15 ways as a sum of consecutive naturals, for example, 1324 + ... + 1546.

It is an arithmetic number, because the mean of its divisors is an integer number (28224).

2³²⁰⁰⁰⁵ is an apocalyptic number.

320005 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

320005 is a deficient number, since it is larger than the sum of its proper divisors (131579).

320005 is a wasteful number, since it uses less digits than its factorization.

320005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276.

The product of its (nonzero) digits is 30, while the sum is 10.

The square root of 320005 is about 565.6898443494. The cubic root of 320005 is about 68.3993941102.

Adding to 320005 its reverse (500023), we get a palindrome (820028).

It can be divided in two parts, 32000 and 5, that multiplied together give a 4-th power (160000 = 20⁴).

The spelling of 320005 in words is "three hundred twenty thousand, five".