320042005 has 8 divisors (see below), whose sum is σ = 384787872. Its totient is φ = 255541968.

The previous prime is 320041993. The next prime is 320042011. The reversal of 320042005 is 500240023.

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 320042005 - 2²⁵ = 286487573 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 320042005.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58579 + ... + 63808.

It is an arithmetic number, because the mean of its divisors is an integer number (48098484).

Almost surely, 2^320042005 is an apocalyptic number.

It is an amenable number.

320042005 is a deficient number, since it is larger than the sum of its proper divisors (64745867).

320042005 is a wasteful number, since it uses less digits than its factorization.

320042005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122915.

The product of its (nonzero) digits is 240, while the sum is 16.

The square root of 320042005 is about 17889.7178569143. The cubic root of 320042005 is about 684.0203055028.

Adding to 320042005 its reverse (500240023), we get a palindrome (820282028).

The spelling of 320042005 in words is "three hundred twenty million, forty-two thousand, five".