42645565 has 16 divisors (see below), whose sum is σ = 53964288. Its totient is φ = 32288256.

The previous prime is 42645563. The next prime is 42645569. The reversal of 42645565 is 56554624.

42645565 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 42645565 - 2¹ = 42645563 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42645563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9244 + ... + 13066.

It is an arithmetic number, because the mean of its divisors is an integer number (3372768).

Almost surely, 2^42645565 is an apocalyptic number.

It is an amenable number.

42645565 is a deficient number, since it is larger than the sum of its proper divisors (11318723).

42645565 is a wasteful number, since it uses less digits than its factorization.

42645565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3948.

The product of its digits is 144000, while the sum is 37.

The square root of 42645565 is about 6530.3571877808. The cubic root of 42645565 is about 349.3745701333.

The spelling of 42645565 in words is "forty-two million, six hundred forty-five thousand, five hundred sixty-five".