42020442 has 24 divisors (see below), whose sum is σ = 91509600. Its totient is φ = 13935240.

The previous prime is 42020441. The next prime is 42020483. The reversal of 42020442 is 24402024.

42020442 is a `hidden beast` number, since 420 + 204 + 42 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (42020441) 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 11 ways as a sum of consecutive naturals, for example, 2284 + ... + 9447.

It is an arithmetic number, because the mean of its divisors is an integer number (3812900).

Almost surely, 2^42020442 is an apocalyptic number.

42020442 is an abundant number, since it is smaller than the sum of its proper divisors (49489158).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42020442 is a wasteful number, since it uses less digits than its factorization.

42020442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11938 (or 11935 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 18.

The square root of 42020442 is about 6482.3176410910. The cubic root of 42020442 is about 347.6590497360.

Adding to 42020442 its reverse (24402024), we get a palindrome (66422466).

The spelling of 42020442 in words is "forty-two million, twenty thousand, four hundred forty-two".