42805865 has 8 divisors (see below), whose sum is σ = 51429120. Its totient is φ = 34203312.

The previous prime is 42805849. The next prime is 42805877. The reversal of 42805865 is 56850824.

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

It is a cyclic number.

It is not a de Polignac number, because 42805865 - 2⁴ = 42805849 is a prime.

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, 185 + ... + 9254.

It is an arithmetic number, because the mean of its divisors is an integer number (6428640).

Almost surely, 2^42805865 is an apocalyptic number.

It is an amenable number.

42805865 is a deficient number, since it is larger than the sum of its proper divisors (8623255).

42805865 is an equidigital number, since it uses as much as digits as its factorization.

42805865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10351.

The product of its (nonzero) digits is 76800, while the sum is 38.

The square root of 42805865 is about 6542.6191238677. The cubic root of 42805865 is about 349.8117763459.

The spelling of 42805865 in words is "forty-two million, eight hundred five thousand, eight hundred sixty-five".