123442105 has 4 divisors (see below), whose sum is σ = 148130532. Its totient is φ = 98753680.

The previous prime is 123442097. The next prime is 123442129. The reversal of 123442105 is 501244321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 501244321 = 167 ⋅3001463.

It can be written as a sum of positive squares in 2 ways, for example, as 33419961 + 90022144 = 5781^2 + 9488^2 .

It is not a de Polignac number, because 123442105 - 2³ = 123442097 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 12344206 + ... + 12344215.

It is an arithmetic number, because the mean of its divisors is an integer number (37032633).

Almost surely, 2^123442105 is an apocalyptic number.

It is an amenable number.

123442105 is a deficient number, since it is larger than the sum of its proper divisors (24688427).

123442105 is an equidigital number, since it uses as much as digits as its factorization.

123442105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24688426.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 123442105 is about 11110.4502609030. The cubic root of 123442105 is about 497.9141169511.

Adding to 123442105 its reverse (501244321), we get a palindrome (624686426).

The spelling of 123442105 in words is "one hundred twenty-three million, four hundred forty-two thousand, one hundred five".