42565499 has 2 divisors, whose sum is σ = 42565500. Its totient is φ = 42565498.

The previous prime is 42565487. The next prime is 42565507. The reversal of 42565499 is 99456524.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42565499 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (42568499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21282749 + 21282750.

It is an arithmetic number, because the mean of its divisors is an integer number (21282750).

Almost surely, 2^42565499 is an apocalyptic number.

42565499 is a deficient number, since it is larger than the sum of its proper divisors (1).

42565499 is an equidigital number, since it uses as much as digits as its factorization.

42565499 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 388800, while the sum is 44.

The square root of 42565499 is about 6524.2240151607. The cubic root of 42565499 is about 349.1557857663.

The spelling of 42565499 in words is "forty-two million, five hundred sixty-five thousand, four hundred ninety-nine".