42004985 has 16 divisors (see below), whose sum is σ = 55164672. Its totient is φ = 30451200.

The previous prime is 42004979. The next prime is 42005053. The reversal of 42004985 is 58940024.

42004985 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-42004985 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 19145 + ... + 21225.

It is an arithmetic number, because the mean of its divisors is an integer number (3447792).

Almost surely, 2^42004985 is an apocalyptic number.

It is an amenable number.

42004985 is a deficient number, since it is larger than the sum of its proper divisors (13159687).

42004985 is a wasteful number, since it uses less digits than its factorization.

42004985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2464.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 42004985 is about 6481.1252880962. The cubic root of 42004985 is about 347.6164163198.

The spelling of 42004985 in words is "forty-two million, four thousand, nine hundred eighty-five".