4042340121 has 16 divisors (see below), whose sum is σ = 5735816064. Its totient is φ = 2523489024.

The previous prime is 4042340063. The next prime is 4042340143. The reversal of 4042340121 is 1210432404.

It is not a de Polignac number, because 4042340121 - 2¹⁴ = 4042323737 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4042340171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 191125 + ... + 211218.

It is an arithmetic number, because the mean of its divisors is an integer number (358488504).

Almost surely, 2^4042340121 is an apocalyptic number.

It is an amenable number.

4042340121 is a deficient number, since it is larger than the sum of its proper divisors (1693475943).

4042340121 is a wasteful number, since it uses less digits than its factorization.

4042340121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402560.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 4042340121 is about 63579.4001308600. The cubic root of 4042340121 is about 1592.9823015323.

Adding to 4042340121 its reverse (1210432404), we get a palindrome (5252772525).

The spelling of 4042340121 in words is "four billion, forty-two million, three hundred forty thousand, one hundred twenty-one".