42705345 has 32 divisors (see below), whose sum is σ = 69848064. Its totient is φ = 22276800.

The previous prime is 42705329. The next prime is 42705347. The reversal of 42705345 is 54350724.

It is not a de Polignac number, because 42705345 - 2⁴ = 42705329 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (42705347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 202290 + ... + 202500.

It is an arithmetic number, because the mean of its divisors is an integer number (2182752).

Almost surely, 2^42705345 is an apocalyptic number.

It is an amenable number.

42705345 is a deficient number, since it is larger than the sum of its proper divisors (27142719).

42705345 is a wasteful number, since it uses less digits than its factorization.

42705345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 453.

The product of its (nonzero) digits is 16800, while the sum is 30.

The square root of 42705345 is about 6534.9326698903. The cubic root of 42705345 is about 349.5377434929.

The spelling of 42705345 in words is "forty-two million, seven hundred five thousand, three hundred forty-five".