42565816 has 8 divisors (see below), whose sum is σ = 79810920. Its totient is φ = 21282904.

The previous prime is 42565813. The next prime is 42565819. The reversal of 42565816 is 61856524.

It is an interprime number because it is at equal distance from previous prime (42565813) and next prime (42565819).

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42565811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2660356 + ... + 2660371.

It is an arithmetic number, because the mean of its divisors is an integer number (9976365).

Almost surely, 2^42565816 is an apocalyptic number.

It is an amenable number.

42565816 is a deficient number, since it is larger than the sum of its proper divisors (37245104).

42565816 is a wasteful number, since it uses less digits than its factorization.

42565816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5320733 (or 5320729 counting only the distinct ones).

The product of its digits is 57600, while the sum is 37.

The square root of 42565816 is about 6524.2483091924. The cubic root of 42565816 is about 349.1566525255.

The spelling of 42565816 in words is "forty-two million, five hundred sixty-five thousand, eight hundred sixteen".