42420542 has 8 divisors (see below), whose sum is σ = 67373856. Its totient is φ = 19962592.

The previous prime is 42420541. The next prime is 42420571. The reversal of 42420542 is 24502424.

42420542 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42420541) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 623798 + ... + 623865.

It is an arithmetic number, because the mean of its divisors is an integer number (8421732).

Almost surely, 2^42420542 is an apocalyptic number.

42420542 is a deficient number, since it is larger than the sum of its proper divisors (24953314).

42420542 is a wasteful number, since it uses less digits than its factorization.

42420542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1247682.

The product of its (nonzero) digits is 2560, while the sum is 23.

The square root of 42420542 is about 6513.1054037226. The cubic root of 42420542 is about 348.7589844510.

Adding to 42420542 its reverse (24502424), we get a palindrome (66922966).

The spelling of 42420542 in words is "forty-two million, four hundred twenty thousand, five hundred forty-two".