123042 has 8 divisors (see below), whose sum is σ = 246096. Its totient is φ = 41012.

The previous prime is 123031. The next prime is 123049. The reversal of 123042 is 240321.

It is a sphenic number, since it is the product of 3 distinct primes.

123042 is an admirable number.

It is a plaindrome in base 15.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 123042.

It is not an unprimeable number, because it can be changed into a prime (123049) by changing a digit.

123042 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10248 + ... + 10259.

It is an arithmetic number, because the mean of its divisors is an integer number (30762).

2¹²³⁰⁴² is an apocalyptic number.

123042 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

123042 is a wasteful number, since it uses less digits than its factorization.

123042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20512.

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 123042 is about 350.7734311489. The cubic root of 123042 is about 49.7375582298.

Adding to 123042 its reverse (240321), we get a palindrome (363363).

The spelling of 123042 in words is "one hundred twenty-three thousand, forty-two", and thus it is an iban number.