42261565 has 8 divisors (see below), whose sum is σ = 50751288. Its totient is φ = 33784320.

The previous prime is 42261563. The next prime is 42261577. The reversal of 42261565 is 56516224.

42261565 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 20629764 + 21631801 = 4542^2 + 4651^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42261565 - 2¹ = 42261563 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 (42261563) 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 7 ways as a sum of consecutive naturals, for example, 7845 + ... + 12085.

It is an arithmetic number, because the mean of its divisors is an integer number (6343911).

Almost surely, 2^42261565 is an apocalyptic number.

It is an amenable number.

42261565 is a deficient number, since it is larger than the sum of its proper divisors (8489723).

42261565 is a wasteful number, since it uses less digits than its factorization.

42261565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6239.

The product of its digits is 14400, while the sum is 31.

The square root of 42261565 is about 6500.8895545148. The cubic root of 42261565 is about 348.3227644715.

Adding to 42261565 its reverse (56516224), we get a palindrome (98777789).

The spelling of 42261565 in words is "forty-two million, two hundred sixty-one thousand, five hundred sixty-five".