42815805 has 16 divisors (see below), whose sum is σ = 70715904. Its totient is φ = 22098240.

The previous prime is 42815791. The next prime is 42815821. The reversal of 42815805 is 50851824.

42815805 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 42815805 - 2⁴ = 42815789 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 45574 + ... + 46503.

It is an arithmetic number, because the mean of its divisors is an integer number (4419744).

Almost surely, 2^42815805 is an apocalyptic number.

It is an amenable number.

42815805 is a deficient number, since it is larger than the sum of its proper divisors (27900099).

42815805 is a wasteful number, since it uses less digits than its factorization.

42815805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92116.

The product of its (nonzero) digits is 12800, while the sum is 33.

The square root of 42815805 is about 6543.3787143952. The cubic root of 42815805 is about 349.8388509843.

The spelling of 42815805 in words is "forty-two million, eight hundred fifteen thousand, eight hundred five".