123442242 has 64 divisors (see below), whose sum is σ = 321214464. Its totient is φ = 30666240.

The previous prime is 123442237. The next prime is 123442243. The reversal of 123442242 is 242244321.

It is not an unprimeable number, because it can be changed into a prime (123442243) 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 31 ways as a sum of consecutive naturals, for example, 4818 + ... + 16434.

It is an arithmetic number, because the mean of its divisors is an integer number (5018976).

Almost surely, 2^123442242 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123442242, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (160607232).

123442242 is an abundant number, since it is smaller than the sum of its proper divisors (197772222).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123442242 is a wasteful number, since it uses less digits than its factorization.

123442242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11663.

The product of its digits is 3072, while the sum is 24.

The square root of 123442242 is about 11110.4564262680. The cubic root of 123442242 is about 497.9143011514.

Adding to 123442242 its reverse (242244321), we get a palindrome (365686563).

The spelling of 123442242 in words is "one hundred twenty-three million, four hundred forty-two thousand, two hundred forty-two".