7200520 has 32 divisors (see below), whose sum is σ = 17155800. Its totient is φ = 2710528.

The previous prime is 7200517. The next prime is 7200521. The reversal of 7200520 is 250027.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 5410276 + 1790244 = 2326^2 + 1338^2 .

It is a junction number, because it is equal to n+sod(n) for n = 7200494 and 7200503.

It is not an unprimeable number, because it can be changed into a prime (7200521) 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 7 ways as a sum of consecutive naturals, for example, 4615 + ... + 5974.

Almost surely, 2^7200520 is an apocalyptic number.

It is an amenable number.

7200520 is an abundant number, since it is smaller than the sum of its proper divisors (9955280).

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

7200520 is a wasteful number, since it uses less digits than its factorization.

7200520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10617 (or 10613 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 16.

The square root of 7200520 is about 2683.3784675293. The cubic root of 7200520 is about 193.1025254618.

Adding to 7200520 its reverse (250027), we get a palindrome (7450547).

The spelling of 7200520 in words is "seven million, two hundred thousand, five hundred twenty".