42040785 has 32 divisors (see below), whose sum is σ = 69455232. Its totient is φ = 21701120.

The previous prime is 42040777. The next prime is 42040829. The reversal of 42040785 is 58704024.

42040785 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 42040785 - 2³ = 42040777 is a prime.

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 31 ways as a sum of consecutive naturals, for example, 120982 + ... + 121328.

It is an arithmetic number, because the mean of its divisors is an integer number (2170476).

Almost surely, 2^42040785 is an apocalyptic number.

It is an amenable number.

42040785 is a deficient number, since it is larger than the sum of its proper divisors (27414447).

42040785 is a wasteful number, since it uses less digits than its factorization.

42040785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 593.

The product of its (nonzero) digits is 8960, while the sum is 30.

The square root of 42040785 is about 6483.8865659418. The cubic root of 42040785 is about 347.7151437600.

The spelling of 42040785 in words is "forty-two million, forty thousand, seven hundred eighty-five".