43240242130042 has 4 divisors (see below), whose sum is σ = 64860363195066. Its totient is φ = 21620121065020.

The previous prime is 43240242130009. The next prime is 43240242130051. The reversal of 43240242130042 is 24003124204234.

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., 42555517324681 + 684724805361 = 6523459^2 + 827481^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 43240242129986 and 43240242130013.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10810060532509 + ... + 10810060532512.

Almost surely, 2^{43240242130042} is an apocalyptic number.

43240242130042 is a deficient number, since it is larger than the sum of its proper divisors (21620121065024).

43240242130042 is a wasteful number, since it uses less digits than its factorization.

43240242130042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21620121065023.

The product of its (nonzero) digits is 36864, while the sum is 31.

Adding to 43240242130042 its reverse (24003124204234), we get a palindrome (67243366334276).

The spelling of 43240242130042 in words is "forty-three trillion, two hundred forty billion, two hundred forty-two million, one hundred thirty thousand, forty-two".