42420541 has 2 divisors, whose sum is σ = 42420542. Its totient is φ = 42420540.

The previous prime is 42420529. The next prime is 42420571. The reversal of 42420541 is 14502424.

It is a happy number.

42420541 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40005625 + 2414916 = 6325^2 + 1554^2 .

It is a cyclic number.

It is not a de Polignac number, because 42420541 - 2⁵ = 42420509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42420571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21210270 + 21210271.

It is an arithmetic number, because the mean of its divisors is an integer number (21210271).

Almost surely, 2^42420541 is an apocalyptic number.

It is an amenable number.

42420541 is a deficient number, since it is larger than the sum of its proper divisors (1).

42420541 is an equidigital number, since it uses as much as digits as its factorization.

42420541 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 42420541 is about 6513.1053269543. The cubic root of 42420541 is about 348.7589817105.

Adding to 42420541 its reverse (14502424), we get a palindrome (56922965).

The spelling of 42420541 in words is "forty-two million, four hundred twenty thousand, five hundred forty-one".