42004424242442 has 4 divisors (see below), whose sum is σ = 63006636363666. Its totient is φ = 21002212121220.

The previous prime is 42004424242441. The next prime is 42004424242453. The reversal of 42004424242442 is 24424242440024.

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., 32846664902401 + 9157759340041 = 5731201^2 + 3026179^2 .

It is a junction number, because it is equal to n+sod(n) for n = 42004424242396 and 42004424242405.

It is not an unprimeable number, because it can be changed into a prime (42004424242441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10501106060609 + ... + 10501106060612.

Almost surely, 2^{42004424242442} is an apocalyptic number.

42004424242442 is a deficient number, since it is larger than the sum of its proper divisors (21002212121224).

42004424242442 is a wasteful number, since it uses less digits than its factorization.

42004424242442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21002212121223.

The product of its (nonzero) digits is 524288, while the sum is 38.

Adding to 42004424242442 its reverse (24424242440024), we get a palindrome (66428666682466).

The spelling of 42004424242442 in words is "forty-two trillion, four billion, four hundred twenty-four million, two hundred forty-two thousand, four hundred forty-two".