42441430421 has 16 divisors (see below), whose sum is σ = 45999543408. Its totient is φ = 38925619200.

The previous prime is 42441430417. The next prime is 42441430441. The reversal of 42441430421 is 12403414424.

It can be written as a sum of positive squares in 8 ways, for example, as 15532636900 + 26908793521 = 124630^2 + 164039^2 .

It is not a de Polignac number, because 42441430421 - 2² = 42441430417 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42441430441) 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 15 ways as a sum of consecutive naturals, for example, 2856191 + ... + 2871011.

It is an arithmetic number, because the mean of its divisors is an integer number (2874971463).

Almost surely, 2^42441430421 is an apocalyptic number.

It is an amenable number.

42441430421 is a deficient number, since it is larger than the sum of its proper divisors (3558112987).

42441430421 is a wasteful number, since it uses less digits than its factorization.

42441430421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16232.

The product of its (nonzero) digits is 12288, while the sum is 29.

Adding to 42441430421 its reverse (12403414424), we get a palindrome (54844844845).

The spelling of 42441430421 in words is "forty-two billion, four hundred forty-one million, four hundred thirty thousand, four hundred twenty-one".