8120420 has 48 divisors (see below), whose sum is σ = 21264768. Its totient is φ = 2530560.

The previous prime is 8120393. The next prime is 8120459. The reversal of 8120420 is 240218.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1097 + ... + 4176.

It is an arithmetic number, because the mean of its divisors is an integer number (443016).

Almost surely, 2^8120420 is an apocalyptic number.

It is an amenable number.

8120420 is an abundant number, since it is smaller than the sum of its proper divisors (13144348).

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

8120420 is a wasteful number, since it uses less digits than its factorization.

8120420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5300 (or 5298 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 8120420 is about 2849.6350643547. The cubic root of 8120420 is about 200.9985066265.

Adding to 8120420 its reverse (240218), we get a palindrome (8360638).

The spelling of 8120420 in words is "eight million, one hundred twenty thousand, four hundred twenty".