42745785 has 16 divisors (see below), whose sum is σ = 68475456. Its totient is φ = 22770368.

The previous prime is 42745783. The next prime is 42745819. The reversal of 42745785 is 58754724.

It is a cyclic number.

It is not a de Polignac number, because 42745785 - 2¹ = 42745783 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42745783) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20407 + ... + 22403.

It is an arithmetic number, because the mean of its divisors is an integer number (4279716).

Almost surely, 2^42745785 is an apocalyptic number.

It is an amenable number.

42745785 is a deficient number, since it is larger than the sum of its proper divisors (25729671).

42745785 is a wasteful number, since it uses less digits than its factorization.

42745785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3432.

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

The square root of 42745785 is about 6538.0260782594. The cubic root of 42745785 is about 349.6480407470.

The spelling of 42745785 in words is "forty-two million, seven hundred forty-five thousand, seven hundred eighty-five".