2042543123 has 4 divisors (see below), whose sum is σ = 2071311408. Its totient is φ = 2013774840.

The previous prime is 2042543119. The next prime is 2042543131. The reversal of 2042543123 is 3213452402.

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 2042543123 - 2² = 2042543119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2042543092 and 2042543101.

It is not an unprimeable number, because it can be changed into a prime (2042543023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14384036 + ... + 14384177.

It is an arithmetic number, because the mean of its divisors is an integer number (517827852).

Almost surely, 2^2042543123 is an apocalyptic number.

2042543123 is a deficient number, since it is larger than the sum of its proper divisors (28768285).

2042543123 is an equidigital number, since it uses as much as digits as its factorization.

2042543123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28768284.

The product of its (nonzero) digits is 5760, while the sum is 26.

The square root of 2042543123 is about 45194.5032387789. The cubic root of 2042543123 is about 1268.7919408980.

Adding to 2042543123 its reverse (3213452402), we get a palindrome (5255995525).

The spelling of 2042543123 in words is "two billion, forty-two million, five hundred forty-three thousand, one hundred twenty-three".