42857985 has 8 divisors (see below), whose sum is σ = 68572800. Its totient is φ = 22857584.

The previous prime is 42857959. The next prime is 42857987. The reversal of 42857985 is 58975824.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42857985 - 2⁵ = 42857953 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42857987) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1428585 + ... + 1428614.

It is an arithmetic number, because the mean of its divisors is an integer number (8571600).

Almost surely, 2^42857985 is an apocalyptic number.

It is an amenable number.

42857985 is a deficient number, since it is larger than the sum of its proper divisors (25714815).

42857985 is a wasteful number, since it uses less digits than its factorization.

42857985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2857207.

The product of its digits is 806400, while the sum is 48.

The square root of 42857985 is about 6546.6010264870. The cubic root of 42857985 is about 349.9536945543.

The spelling of 42857985 in words is "forty-two million, eight hundred fifty-seven thousand, nine hundred eighty-five".