42043985 has 16 divisors (see below), whose sum is σ = 51603456. Its totient is φ = 32876928.

The previous prime is 42043961. The next prime is 42043993. The reversal of 42043985 is 58934024.

It is a cyclic number.

It is not a de Polignac number, because 42043985 - 2⁶ = 42043921 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45902 + ... + 46808.

It is an arithmetic number, because the mean of its divisors is an integer number (3225216).

Almost surely, 2^42043985 is an apocalyptic number.

It is an amenable number.

42043985 is a deficient number, since it is larger than the sum of its proper divisors (9559471).

42043985 is a wasteful number, since it uses less digits than its factorization.

42043985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1112.

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 42043985 is about 6484.1333268217. The cubic root of 42043985 is about 347.7239658299.

The spelling of 42043985 in words is "forty-two million, forty-three thousand, nine hundred eighty-five".