128324123 has 4 divisors (see below), whose sum is σ = 128441568. Its totient is φ = 128206680.

The previous prime is 128324117. The next prime is 128324129. The reversal of 128324123 is 321423821.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (128324117) and next prime (128324129).

It is a cyclic number.

It is not a de Polignac number, because 128324123 - 2¹⁰ = 128323099 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 128324092 and 128324101.

It is not an unprimeable number, because it can be changed into a prime (128324129) 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 3 ways as a sum of consecutive naturals, for example, 57068 + ... + 59273.

It is an arithmetic number, because the mean of its divisors is an integer number (32110392).

Almost surely, 2^128324123 is an apocalyptic number.

128324123 is a deficient number, since it is larger than the sum of its proper divisors (117445).

128324123 is a wasteful number, since it uses less digits than its factorization.

128324123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117444.

The product of its digits is 2304, while the sum is 26.

The square root of 128324123 is about 11328.0237905824. The cubic root of 128324123 is about 504.3934461893.

Adding to 128324123 its reverse (321423821), we get a palindrome (449747944).

The spelling of 128324123 in words is "one hundred twenty-eight million, three hundred twenty-four thousand, one hundred twenty-three".