42302081 has 2 divisors, whose sum is σ = 42302082. Its totient is φ = 42302080.

The previous prime is 42302077. The next prime is 42302089. The reversal of 42302081 is 18020324.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38241856 + 4060225 = 6184^2 + 2015^2 .

It is a cyclic number.

It is not a de Polignac number, because 42302081 - 2² = 42302077 is a prime.

It is a super-2 number, since 2×42302081² = 3578932113861122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42302089) 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, 21151040 + 21151041.

It is an arithmetic number, because the mean of its divisors is an integer number (21151041).

Almost surely, 2^42302081 is an apocalyptic number.

It is an amenable number.

42302081 is a deficient number, since it is larger than the sum of its proper divisors (1).

42302081 is an equidigital number, since it uses as much as digits as its factorization.

42302081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 42302081 is about 6504.0049969230. The cubic root of 42302081 is about 348.4340408177.

The spelling of 42302081 in words is "forty-two million, three hundred two thousand, eighty-one".