42238841 has 2 divisors, whose sum is σ = 42238842. Its totient is φ = 42238840.

The previous prime is 42238837. The next prime is 42238871. The reversal of 42238841 is 14883224.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32535616 + 9703225 = 5704^2 + 3115^2 .

It is a cyclic number.

It is not a de Polignac number, because 42238841 - 2² = 42238837 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 42238798 and 42238807.

It is not a weakly prime, because it can be changed into another prime (42238811) 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, 21119420 + 21119421.

It is an arithmetic number, because the mean of its divisors is an integer number (21119421).

Almost surely, 2^42238841 is an apocalyptic number.

It is an amenable number.

42238841 is a deficient number, since it is larger than the sum of its proper divisors (1).

42238841 is an equidigital number, since it uses as much as digits as its factorization.

42238841 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12288, while the sum is 32.

The square root of 42238841 is about 6499.1415586983. The cubic root of 42238841 is about 348.2603223479.

The spelling of 42238841 in words is "forty-two million, two hundred thirty-eight thousand, eight hundred forty-one".