123115443 has 12 divisors (see below), whose sum is σ = 180434184. Its totient is φ = 74615200.

The previous prime is 123115441. The next prime is 123115453. The reversal of 123115443 is 344511321.

It is a happy number.

It is not a de Polignac number, because 123115443 - 2¹ = 123115441 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123115441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 169218 + ... + 169943.

It is an arithmetic number, because the mean of its divisors is an integer number (15036182).

Almost surely, 2^123115443 is an apocalyptic number.

123115443 is a deficient number, since it is larger than the sum of its proper divisors (57318741).

123115443 is a wasteful number, since it uses less digits than its factorization.

123115443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339186 (or 339175 counting only the distinct ones).

The product of its digits is 1440, while the sum is 24.

The square root of 123115443 is about 11095.7398581618. The cubic root of 123115443 is about 497.4745227393.

Adding to 123115443 its reverse (344511321), we get a palindrome (467626764).

The spelling of 123115443 in words is "one hundred twenty-three million, one hundred fifteen thousand, four hundred forty-three".