123542423 has 4 divisors (see below), whose sum is σ = 124741968. Its totient is φ = 122342880.

The previous prime is 123542411. The next prime is 123542437. The reversal of 123542423 is 324245321.

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

It is a cyclic number.

It is not a de Polignac number, because 123542423 - 2¹⁶ = 123476887 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123542392 and 123542401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123542623) 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 3 ways as a sum of consecutive naturals, for example, 599618 + ... + 599823.

It is an arithmetic number, because the mean of its divisors is an integer number (31185492).

Almost surely, 2^123542423 is an apocalyptic number.

123542423 is a deficient number, since it is larger than the sum of its proper divisors (1199545).

123542423 is a wasteful number, since it uses less digits than its factorization.

123542423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1199544.

The product of its digits is 5760, while the sum is 26.

The square root of 123542423 is about 11114.9639225685. The cubic root of 123542423 is about 498.0489607944.

Adding to 123542423 its reverse (324245321), we get a palindrome (447787744).

The spelling of 123542423 in words is "one hundred twenty-three million, five hundred forty-two thousand, four hundred twenty-three".