42559565 has 4 divisors (see below), whose sum is σ = 51071484. Its totient is φ = 34047648.

The previous prime is 42559541. The next prime is 42559567. The reversal of 42559565 is 56595524.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6295081 + 36264484 = 2509^2 + 6022^2 .

It is a cyclic number.

It is not a de Polignac number, because 42559565 - 2²⁴ = 25782349 is a prime.

It is a super-2 number, since 2×42559565² = 3622633145978450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42559567) 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 in 3 ways as a sum of consecutive naturals, for example, 4255952 + ... + 4255961.

It is an arithmetic number, because the mean of its divisors is an integer number (12767871).

Almost surely, 2^42559565 is an apocalyptic number.

It is an amenable number.

42559565 is a deficient number, since it is larger than the sum of its proper divisors (8511919).

42559565 is an equidigital number, since it uses as much as digits as its factorization.

42559565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8511918.

The product of its digits is 270000, while the sum is 41.

The square root of 42559565 is about 6523.7692325833. The cubic root of 42559565 is about 349.1395598966.

The spelling of 42559565 in words is "forty-two million, five hundred fifty-nine thousand, five hundred sixty-five".