42020441 has 2 divisors, whose sum is σ = 42020442. Its totient is φ = 42020440.

The previous prime is 42020437. The next prime is 42020483. The reversal of 42020441 is 14402024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25210441 + 16810000 = 5021^2 + 4100^2 .

It is a cyclic number.

It is not a de Polignac number, because 42020441 - 2² = 42020437 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (42023441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21010220 + 21010221.

It is an arithmetic number, because the mean of its divisors is an integer number (21010221).

Almost surely, 2^42020441 is an apocalyptic number.

It is an amenable number.

42020441 is a deficient number, since it is larger than the sum of its proper divisors (1).

42020441 is an equidigital number, since it uses as much as digits as its factorization.

42020441 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 42020441 is about 6482.3175639581. The cubic root of 42020441 is about 347.6590469781.

Adding to 42020441 its reverse (14402024), we get a palindrome (56422465).

The spelling of 42020441 in words is "forty-two million, twenty thousand, four hundred forty-one".