123110442 has 120 divisors (see below), whose sum is σ = 345870756. Its totient is φ = 32441472.

The previous prime is 123110411. The next prime is 123110459. The reversal of 123110442 is 244011321.

It can be written as a sum of positive squares in 2 ways, for example, as 118788201 + 4322241 = 10899^2 + 2079^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 102598 + ... + 103790.

Almost surely, 2^123110442 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123110442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (172935378).

123110442 is an abundant number, since it is smaller than the sum of its proper divisors (222760314).

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

123110442 is a wasteful number, since it uses less digits than its factorization.

123110442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1234 (or 1218 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 123110442 is about 11095.5144991118. The cubic root of 123110442 is about 497.4677867748.

Adding to 123110442 its reverse (244011321), we get a palindrome (367121763).

The spelling of 123110442 in words is "one hundred twenty-three million, one hundred ten thousand, four hundred forty-two".