42064481 has 2 divisors, whose sum is σ = 42064482. Its totient is φ = 42064480.

The previous prime is 42064459. The next prime is 42064487. The reversal of 42064481 is 18446024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25090081 + 16974400 = 5009^2 + 4120^2 .

It is a cyclic number.

It is not a de Polignac number, because 42064481 - 2²² = 37870177 is a prime.

It is a super-2 number, since 2×42064481² = 3538841123598722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (42064487) 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, 21032240 + 21032241.

It is an arithmetic number, because the mean of its divisors is an integer number (21032241).

Almost surely, 2^42064481 is an apocalyptic number.

It is an amenable number.

42064481 is a deficient number, since it is larger than the sum of its proper divisors (1).

42064481 is an equidigital number, since it uses as much as digits as its factorization.

42064481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6144, while the sum is 29.

The square root of 42064481 is about 6485.7136076148. The cubic root of 42064481 is about 347.7804605747.

The spelling of 42064481 in words is "forty-two million, sixty-four thousand, four hundred eighty-one".