320145123 has 16 divisors (see below), whose sum is σ = 443440800. Its totient is φ = 205201920.

The previous prime is 320145121. The next prime is 320145143. The reversal of 320145123 is 321541023.

It is not a de Polignac number, because 320145123 - 2¹ = 320145121 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 320145123.

It is not an unprimeable number, because it can be changed into a prime (320145121) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 13333 + ... + 28601.

It is an arithmetic number, because the mean of its divisors is an integer number (27715050).

Almost surely, 2^320145123 is an apocalyptic number.

320145123 is a deficient number, since it is larger than the sum of its proper divisors (123295677).

320145123 is a wasteful number, since it uses less digits than its factorization.

320145123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15542.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 320145123 is about 17892.5996713725. The cubic root of 320145123 is about 684.0937617269.

Adding to 320145123 its reverse (321541023), we get a palindrome (641686146).

The spelling of 320145123 in words is "three hundred twenty million, one hundred forty-five thousand, one hundred twenty-three".