42240420241 has 4 divisors (see below), whose sum is σ = 42275592484. Its totient is φ = 42205248000.

The previous prime is 42240420239. The next prime is 42240420259. The reversal of 42240420241 is 14202404224.

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

It can be written as a sum of positive squares in 2 ways, for example, as 16449345025 + 25791075216 = 128255^2 + 160596^2 .

It is a cyclic number.

It is not a de Polignac number, because 42240420241 - 2¹ = 42240420239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42240420221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17584320 + ... + 17586721.

It is an arithmetic number, because the mean of its divisors is an integer number (10568898121).

Almost surely, 2^42240420241 is an apocalyptic number.

It is an amenable number.

42240420241 is a deficient number, since it is larger than the sum of its proper divisors (35172243).

42240420241 is a wasteful number, since it uses less digits than its factorization.

42240420241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35172242.

The product of its (nonzero) digits is 4096, while the sum is 25.

Adding to 42240420241 its reverse (14202404224), we get a palindrome (56442824465).

The spelling of 42240420241 in words is "forty-two billion, two hundred forty million, four hundred twenty thousand, two hundred forty-one".