42908565 has 24 divisors (see below), whose sum is σ = 79863840. Its totient is φ = 19615008.

The previous prime is 42908563. The next prime is 42908587. The reversal of 42908565 is 56580924.

It is not a de Polignac number, because 42908565 - 2¹ = 42908563 is a prime.

It is a super-3 number, since 3×42908565³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42908563) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28455 + ... + 29924.

It is an arithmetic number, because the mean of its divisors is an integer number (3327660).

Almost surely, 2^42908565 is an apocalyptic number.

It is an amenable number.

42908565 is a deficient number, since it is larger than the sum of its proper divisors (36955275).

42908565 is a wasteful number, since it uses less digits than its factorization.

42908565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58401 (or 58394 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 39.

The square root of 42908565 is about 6550.4629607380. The cubic root of 42908565 is about 350.0913095100.

The spelling of 42908565 in words is "forty-two million, nine hundred eight thousand, five hundred sixty-five".