42006865 has 8 divisors (see below), whose sum is σ = 50503680. Its totient is φ = 33541872.

The previous prime is 42006859. The next prime is 42006889. The reversal of 42006865 is 56860024.

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 42006865 - 2⁷ = 42006737 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4945 + ... + 10414.

It is an arithmetic number, because the mean of its divisors is an integer number (6312960).

Almost surely, 2^42006865 is an apocalyptic number.

It is an amenable number.

42006865 is a deficient number, since it is larger than the sum of its proper divisors (8496815).

42006865 is a wasteful number, since it uses less digits than its factorization.

42006865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15911.

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 42006865 is about 6481.2703230154. The cubic root of 42006865 is about 347.6216022846.

Adding to 42006865 its reverse (56860024), we get a palindrome (98866889).

The spelling of 42006865 in words is "forty-two million, six thousand, eight hundred sixty-five".