123021342 has 80 divisors (see below), whose sum is σ = 290945952. Its totient is φ = 38776320.

The previous prime is 123021331. The next prime is 123021359. The reversal of 123021342 is 243120321.

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 pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 510342 + ... + 510582.

Almost surely, 2^123021342 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123021342, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (145472976).

123021342 is an abundant number, since it is smaller than the sum of its proper divisors (167924610).

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

123021342 is a wasteful number, since it uses less digits than its factorization.

123021342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 415 (or 406 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 123021342 is about 11091.4986363431. The cubic root of 123021342 is about 497.3477452996.

Adding to 123021342 its reverse (243120321), we get a palindrome (366141663).

The spelling of 123021342 in words is "one hundred twenty-three million, twenty-one thousand, three hundred forty-two".