42020039 has 24 divisors (see below), whose sum is σ = 48390048. Its totient is φ = 36334080.

The previous prime is 42020029. The next prime is 42020059. The reversal of 42020039 is 93002024.

It is not a de Polignac number, because 42020039 - 2⁴ = 42020023 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42020039.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42020029) 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 23 ways as a sum of consecutive naturals, for example, 251534 + ... + 251700.

It is an arithmetic number, because the mean of its divisors is an integer number (2016252).

Almost surely, 2^42020039 is an apocalyptic number.

42020039 is a deficient number, since it is larger than the sum of its proper divisors (6370009).

42020039 is a wasteful number, since it uses less digits than its factorization.

42020039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263 (or 244 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 42020039 is about 6482.2865564552. The cubic root of 42020039 is about 347.6579383163.

The spelling of 42020039 in words is "forty-two million, twenty thousand, thirty-nine".