123135423 has 16 divisors (see below), whose sum is σ = 168521472. Its totient is φ = 79928000.

The previous prime is 123135391. The next prime is 123135427. The reversal of 123135423 is 324531321.

It is a cyclic number.

It is not a de Polignac number, because 123135423 - 2⁵ = 123135391 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 123135393 and 123135402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123135427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 118918 + ... + 119948.

It is an arithmetic number, because the mean of its divisors is an integer number (10532592).

Almost surely, 2^123135423 is an apocalyptic number.

123135423 is a deficient number, since it is larger than the sum of its proper divisors (45386049).

123135423 is a wasteful number, since it uses less digits than its factorization.

123135423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2046.

The product of its digits is 2160, while the sum is 24.

The square root of 123135423 is about 11096.6401671857. The cubic root of 123135423 is about 497.5014324513.

Adding to 123135423 its reverse (324531321), we get a palindrome (447666744).

The spelling of 123135423 in words is "one hundred twenty-three million, one hundred thirty-five thousand, four hundred twenty-three".