42435565 has 8 divisors (see below), whose sum is σ = 51757848. Its totient is φ = 33391680.

The previous prime is 42435551. The next prime is 42435571. The reversal of 42435565 is 56553424.

It can be written as a sum of positive squares in 4 ways, for example, as 6651241 + 35784324 = 2579^2 + 5982^2 .

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

It is not a de Polignac number, because 42435565 - 2¹⁵ = 42402797 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42435565.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69262 + ... + 69871.

It is an arithmetic number, because the mean of its divisors is an integer number (6469731).

Almost surely, 2^42435565 is an apocalyptic number.

It is an amenable number.

42435565 is a deficient number, since it is larger than the sum of its proper divisors (9322283).

42435565 is a wasteful number, since it uses less digits than its factorization.

42435565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139199.

The product of its digits is 72000, while the sum is 34.

The square root of 42435565 is about 6514.2585917355. The cubic root of 42435565 is about 348.8001499461.

Adding to 42435565 its reverse (56553424), we get a palindrome (98988989).

The spelling of 42435565 in words is "forty-two million, four hundred thirty-five thousand, five hundred sixty-five".