42785457 has 16 divisors (see below), whose sum is σ = 67021248. Its totient is φ = 23935680.

The previous prime is 42785441. The next prime is 42785459. The reversal of 42785457 is 75458724.

42785457 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 42785457 - 2⁴ = 42785441 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42785459) by changing a digit.

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, 49438 + ... + 50295.

It is an arithmetic number, because the mean of its divisors is an integer number (4188828).

Almost surely, 2^42785457 is an apocalyptic number.

It is an amenable number.

42785457 is a deficient number, since it is larger than the sum of its proper divisors (24235791).

42785457 is a wasteful number, since it uses less digits than its factorization.

42785457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99760.

The product of its digits is 313600, while the sum is 42.

The square root of 42785457 is about 6541.0593178781. The cubic root of 42785457 is about 349.7561757598.

The spelling of 42785457 in words is "forty-two million, seven hundred eighty-five thousand, four hundred fifty-seven".