42536609 has 2 divisors, whose sum is σ = 42536610. Its totient is φ = 42536608.

The previous prime is 42536561. The next prime is 42536647. The reversal of 42536609 is 90663524.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37246609 + 5290000 = 6103^2 + 2300^2 .

It is a cyclic number.

It is not a de Polignac number, because 42536609 - 2⁸ = 42536353 is a prime.

It is not a weakly prime, because it can be changed into another prime (42536509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21268304 + 21268305.

It is an arithmetic number, because the mean of its divisors is an integer number (21268305).

Almost surely, 2^42536609 is an apocalyptic number.

It is an amenable number.

42536609 is a deficient number, since it is larger than the sum of its proper divisors (1).

42536609 is an equidigital number, since it uses as much as digits as its factorization.

42536609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38880, while the sum is 35.

The square root of 42536609 is about 6522.0095829430. The cubic root of 42536609 is about 349.0767750350.

The spelling of 42536609 in words is "forty-two million, five hundred thirty-six thousand, six hundred nine".