1142042123 has 4 divisors (see below), whose sum is σ = 1145314800. Its totient is φ = 1138769448.

The previous prime is 1142042107. The next prime is 1142042129. The reversal of 1142042123 is 3212402411.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1142042123 - 2⁴ = 1142042107 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1142042095 and 1142042104.

It is not an unprimeable number, because it can be changed into a prime (1142042129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1635815 + ... + 1636512.

It is an arithmetic number, because the mean of its divisors is an integer number (286328700).

Almost surely, 2^1142042123 is an apocalyptic number.

1142042123 is a deficient number, since it is larger than the sum of its proper divisors (3272677).

1142042123 is an equidigital number, since it uses as much as digits as its factorization.

1142042123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3272676.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 1142042123 is about 33794.1137330157. The cubic root of 1142042123 is about 1045.2673241446.

Adding to 1142042123 its reverse (3212402411), we get a palindrome (4354444534).

The spelling of 1142042123 in words is "one billion, one hundred forty-two million, forty-two thousand, one hundred twenty-three".