7205520 has 80 divisors (see below), whose sum is σ = 25534080. Its totient is φ = 1646592.

The previous prime is 7205507. The next prime is 7205521. The reversal of 7205520 is 255027.

7205520 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (7205521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 465 + ... + 3824.

It is an arithmetic number, because the mean of its divisors is an integer number (319176).

Almost surely, 2^7205520 is an apocalyptic number.

7205520 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7205520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12767040).

7205520 is an abundant number, since it is smaller than the sum of its proper divisors (18328560).

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

7205520 is a wasteful number, since it uses less digits than its factorization.

7205520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4312 (or 4306 counting only the distinct ones).

The product of its (nonzero) digits is 700, while the sum is 21.

The square root of 7205520 is about 2684.3099671983. The cubic root of 7205520 is about 193.1472115507.

The spelling of 7205520 in words is "seven million, two hundred five thousand, five hundred twenty".