42865015 has 4 divisors (see below), whose sum is σ = 51438024. Its totient is φ = 34292008.

The previous prime is 42865001. The next prime is 42865061. The reversal of 42865015 is 51056824.

42865015 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42865015 - 2¹³ = 42856823 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4286497 + ... + 4286506.

It is an arithmetic number, because the mean of its divisors is an integer number (12859506).

Almost surely, 2^42865015 is an apocalyptic number.

42865015 is a deficient number, since it is larger than the sum of its proper divisors (8573009).

42865015 is an equidigital number, since it uses as much as digits as its factorization.

42865015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8573008.

The product of its (nonzero) digits is 9600, while the sum is 31.

The square root of 42865015 is about 6547.1379243147. The cubic root of 42865015 is about 349.9728278225.

The spelling of 42865015 in words is "forty-two million, eight hundred sixty-five thousand, fifteen".