42917565 has 16 divisors (see below), whose sum is σ = 69195456. Its totient is φ = 22713600.

The previous prime is 42917543. The next prime is 42917573. The reversal of 42917565 is 56571924.

It is not a de Polignac number, because 42917565 - 2¹⁴ = 42901181 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8956 + ... + 12885.

It is an arithmetic number, because the mean of its divisors is an integer number (4324716).

Almost surely, 2^42917565 is an apocalyptic number.

It is an amenable number.

42917565 is a deficient number, since it is larger than the sum of its proper divisors (26277891).

42917565 is a wasteful number, since it uses less digits than its factorization.

42917565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21980.

The product of its digits is 75600, while the sum is 39.

The square root of 42917565 is about 6551.1498990635. The cubic root of 42917565 is about 350.1157848218.

The spelling of 42917565 in words is "forty-two million, nine hundred seventeen thousand, five hundred sixty-five".