42020985 has 16 divisors (see below), whose sum is σ = 67326336. Its totient is φ = 22380288.

The previous prime is 42020983. The next prime is 42021017. The reversal of 42020985 is 58902024.

It is not a de Polignac number, because 42020985 - 2¹ = 42020983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42020983) 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, 13057 + ... + 15953.

It is an arithmetic number, because the mean of its divisors is an integer number (4207896).

Almost surely, 2^42020985 is an apocalyptic number.

It is an amenable number.

42020985 is a deficient number, since it is larger than the sum of its proper divisors (25305351).

42020985 is a wasteful number, since it uses less digits than its factorization.

42020985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3872.

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 42020985 is about 6482.3595241239. The cubic root of 42020985 is about 347.6605472456.

The spelling of 42020985 in words is "forty-two million, twenty thousand, nine hundred eighty-five".