42420512 has 24 divisors (see below), whose sum is σ = 84696192. Its totient is φ = 20910400.

The previous prime is 42420509. The next prime is 42420529. The reversal of 42420512 is 21502424.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7064 + ... + 11607.

It is an arithmetic number, because the mean of its divisors is an integer number (3529008).

Almost surely, 2^42420512 is an apocalyptic number.

It is an amenable number.

42420512 is a deficient number, since it is larger than the sum of its proper divisors (42275680).

42420512 is a wasteful number, since it uses less digits than its factorization.

42420512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18752 (or 18744 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 42420512 is about 6513.1031006733. The cubic root of 42420512 is about 348.7589022363.

Adding to 42420512 its reverse (21502424), we get a palindrome (63922936).

The spelling of 42420512 in words is "forty-two million, four hundred twenty thousand, five hundred twelve".