42120304420 has 24 divisors (see below), whose sum is σ = 89772830784. Its totient is φ = 16596656736.

The previous prime is 42120304403. The next prime is 42120304433. The reversal of 42120304420 is 2440302124.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 42120304391 and 42120304400.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15715192 + ... + 15717871.

It is an arithmetic number, because the mean of its divisors is an integer number (3740534616).

Almost surely, 2^42120304420 is an apocalyptic number.

It is an amenable number.

42120304420 is an abundant number, since it is smaller than the sum of its proper divisors (47652526364).

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

42120304420 is a wasteful number, since it uses less digits than its factorization.

42120304420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31433139 (or 31433137 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

Adding to 42120304420 its reverse (2440302124), we get a palindrome (44560606544).

The spelling of 42120304420 in words is "forty-two billion, one hundred twenty million, three hundred four thousand, four hundred twenty".