1042120123 has 12 divisors (see below), whose sum is σ = 1150068024. Its totient is φ = 943580000.

The previous prime is 1042120073. The next prime is 1042120129. The reversal of 1042120123 is 3210212401.

It is a de Polignac number, because none of the positive numbers 2^k-1042120123 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1042120097 and 1042120106.

It is not an unprimeable number, because it can be changed into a prime (1042120129) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13215 + ... + 47527.

It is an arithmetic number, because the mean of its divisors is an integer number (95839002).

Almost surely, 2^1042120123 is an apocalyptic number.

1042120123 is a deficient number, since it is larger than the sum of its proper divisors (107947901).

1042120123 is a wasteful number, since it uses less digits than its factorization.

1042120123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34586 (or 34575 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 1042120123 is about 32281.8853693523. The cubic root of 1042120123 is about 1013.8474052840.

Adding to 1042120123 its reverse (3210212401), we get a palindrome (4252332524).

The spelling of 1042120123 in words is "one billion, forty-two million, one hundred twenty thousand, one hundred twenty-three".