42145565 has 16 divisors (see below), whose sum is σ = 63054720. Its totient is φ = 26272320.

The previous prime is 42145561. The next prime is 42145573. The reversal of 42145565 is 56554124.

It is not a de Polignac number, because 42145565 - 2² = 42145561 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42145561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54350 + ... + 55119.

It is an arithmetic number, because the mean of its divisors is an integer number (3940920).

Almost surely, 2^42145565 is an apocalyptic number.

It is an amenable number.

42145565 is a deficient number, since it is larger than the sum of its proper divisors (20909155).

42145565 is a wasteful number, since it uses less digits than its factorization.

42145565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109492.

The product of its digits is 24000, while the sum is 32.

The square root of 42145565 is about 6491.9615679700. The cubic root of 42145565 is about 348.0037790799.

Adding to 42145565 its reverse (56554124), we get a palindrome (98699689).

It can be divided in two parts, 4214 and 5565, that added together give a palindrome (9779).

The spelling of 42145565 in words is "forty-two million, one hundred forty-five thousand, five hundred sixty-five".