2143123042 has 4 divisors (see below), whose sum is σ = 3214684566. Its totient is φ = 1071561520.

The previous prime is 2143123033. The next prime is 2143123043. The reversal of 2143123042 is 2403213412.

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

It can be written as a sum of positive squares in only one way, i.e., 1700820081 + 442302961 = 41241^2 + 21031^2 .

It is not an unprimeable number, because it can be changed into a prime (2143123043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 535780759 + ... + 535780762.

Almost surely, 2^2143123042 is an apocalyptic number.

2143123042 is a deficient number, since it is larger than the sum of its proper divisors (1071561524).

2143123042 is a wasteful number, since it uses less digits than its factorization.

2143123042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1071561523.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 2143123042 is about 46293.8769385326. The cubic root of 2143123042 is about 1289.2853125119.

Adding to 2143123042 its reverse (2403213412), we get a palindrome (4546336454).

The spelling of 2143123042 in words is "two billion, one hundred forty-three million, one hundred twenty-three thousand, forty-two".