42011565 has 16 divisors (see below), whose sum is σ = 70756800. Its totient is φ = 21226752.

The previous prime is 42011551. The next prime is 42011579. The reversal of 42011565 is 56511024.

It is an interprime number because it is at equal distance from previous prime (42011551) and next prime (42011579).

It is not a de Polignac number, because 42011565 - 2⁴ = 42011549 is a prime.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 73420 + ... + 73989.

It is an arithmetic number, because the mean of its divisors is an integer number (4422300).

Almost surely, 2^42011565 is an apocalyptic number.

It is an amenable number.

42011565 is a deficient number, since it is larger than the sum of its proper divisors (28745235).

42011565 is a wasteful number, since it uses less digits than its factorization.

42011565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147436.

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 42011565 is about 6481.6328961150. The cubic root of 42011565 is about 347.6345665195.

Adding to 42011565 its reverse (56511024), we get a palindrome (98522589).

The spelling of 42011565 in words is "forty-two million, eleven thousand, five hundred sixty-five".