42020043 has 32 divisors (see below), whose sum is σ = 63685440. Its totient is φ = 24460800.

The previous prime is 42020029. The next prime is 42020059. The reversal of 42020043 is 34002024.

It is a happy number.

It is not a de Polignac number, because 42020043 - 2⁶ = 42019979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42020003) 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 31 ways as a sum of consecutive naturals, for example, 59593 + ... + 60293.

It is an arithmetic number, because the mean of its divisors is an integer number (1990170).

Almost surely, 2^42020043 is an apocalyptic number.

42020043 is a deficient number, since it is larger than the sum of its proper divisors (21665397).

42020043 is a wasteful number, since it uses less digits than its factorization.

42020043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 799.

The product of its (nonzero) digits is 192, while the sum is 15.

The square root of 42020043 is about 6482.2868649883. The cubic root of 42020043 is about 347.6579493478.

Adding to 42020043 its reverse (34002024), we get a palindrome (76022067).

The spelling of 42020043 in words is "forty-two million, twenty thousand, forty-three".