4042340123 has 4 divisors (see below), whose sum is σ = 4059253920. Its totient is φ = 4025426328.

The previous prime is 4042340063. The next prime is 4042340143. The reversal of 4042340123 is 3210432404.

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 4042340123 - 2¹² = 4042336027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4042340143) 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, 8456540 + ... + 8457017.

It is an arithmetic number, because the mean of its divisors is an integer number (1014813480).

Almost surely, 2^4042340123 is an apocalyptic number.

4042340123 is a deficient number, since it is larger than the sum of its proper divisors (16913797).

4042340123 is a wasteful number, since it uses less digits than its factorization.

4042340123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16913796.

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 4042340123 is about 63579.4001465884. The cubic root of 4042340123 is about 1592.9823017950.

Adding to 4042340123 its reverse (3210432404), we get a palindrome (7252772527).

The spelling of 4042340123 in words is "four billion, forty-two million, three hundred forty thousand, one hundred twenty-three".