123021042 has 8 divisors (see below), whose sum is σ = 246042096. Its totient is φ = 41007012.

The previous prime is 123021013. The next prime is 123021047. The reversal of 123021042 is 240120321.

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

123021042 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (123021047) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10251748 + ... + 10251759.

It is an arithmetic number, because the mean of its divisors is an integer number (30755262).

Almost surely, 2^123021042 is an apocalyptic number.

123021042 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.

123021042 is a wasteful number, since it uses less digits than its factorization.

123021042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20503512.

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

The square root of 123021042 is about 11091.4851124635. The cubic root of 123021042 is about 497.3473410216.

Adding to 123021042 its reverse (240120321), we get a palindrome (363141363).

The spelling of 123021042 in words is "one hundred twenty-three million, twenty-one thousand, forty-two".