123102042 has 64 divisors (see below), whose sum is σ = 293068800. Its totient is φ = 33727680.

The previous prime is 123102037. The next prime is 123102053. The reversal of 123102042 is 240201321.

It is a super-2 number, since 2×123102042² = 30308225489139528, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 256759 + ... + 257237.

It is an arithmetic number, because the mean of its divisors is an integer number (4579200).

Almost surely, 2^123102042 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123102042, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (146534400).

123102042 is an abundant number, since it is smaller than the sum of its proper divisors (169966758).

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

123102042 is a wasteful number, since it uses less digits than its factorization.

123102042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 731.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 123102042 is about 11095.1359613121. The cubic root of 123102042 is about 497.4564722066.

Adding to 123102042 its reverse (240201321), we get a palindrome (363303363).

The spelling of 123102042 in words is "one hundred twenty-three million, one hundred two thousand, forty-two".