7120720 has 20 divisors (see below), whose sum is σ = 16555860. Its totient is φ = 2848256.

The previous prime is 7120697. The next prime is 7120723. The reversal of 7120720 is 270217.

It can be written as a sum of positive squares in 2 ways, for example, as 3341584 + 3779136 = 1828^2 + 1944^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7120723) 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 3 ways as a sum of consecutive naturals, for example, 44425 + ... + 44584.

It is an arithmetic number, because the mean of its divisors is an integer number (827793).

Almost surely, 2^7120720 is an apocalyptic number.

It is an amenable number.

7120720 is an abundant number, since it is smaller than the sum of its proper divisors (9435140).

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

7120720 is a wasteful number, since it uses less digits than its factorization.

7120720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89022 (or 89016 counting only the distinct ones).

The product of its (nonzero) digits is 196, while the sum is 19.

The square root of 7120720 is about 2668.4677251187. The cubic root of 7120720 is about 192.3865188232.

Adding to 7120720 its reverse (270217), we get a palindrome (7390937).

The spelling of 7120720 in words is "seven million, one hundred twenty thousand, seven hundred twenty".