42535609 has 2 divisors, whose sum is σ = 42535610. Its totient is φ = 42535608.

The previous prime is 42535583. The next prime is 42535613. The reversal of 42535609 is 90653524.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38007225 + 4528384 = 6165^2 + 2128^2 .

It is a cyclic number.

It is not a de Polignac number, because 42535609 - 2¹³ = 42527417 is a prime.

It is not a weakly prime, because it can be changed into another prime (42535639) 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, 21267804 + 21267805.

It is an arithmetic number, because the mean of its divisors is an integer number (21267805).

Almost surely, 2^42535609 is an apocalyptic number.

It is an amenable number.

42535609 is a deficient number, since it is larger than the sum of its proper divisors (1).

42535609 is an equidigital number, since it uses as much as digits as its factorization.

42535609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32400, while the sum is 34.

The square root of 42535609 is about 6521.9329190049. The cubic root of 42535609 is about 349.0740395128.

The spelling of 42535609 in words is "forty-two million, five hundred thirty-five thousand, six hundred nine".