9725520 has 120 divisors (see below), whose sum is σ = 35113824. Its totient is φ = 2220288.

The previous prime is 9725491. The next prime is 9725531. The reversal of 9725520 is 255279.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11347 + ... + 12173.

Almost surely, 2^9725520 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9725520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17556912).

9725520 is an abundant number, since it is smaller than the sum of its proper divisors (25388304).

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

9725520 is a wasteful number, since it uses less digits than its factorization.

9725520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 857 (or 844 counting only the distinct ones).

The product of its (nonzero) digits is 6300, while the sum is 30.

The square root of 9725520 is about 3118.5765983859. The cubic root of 9725520 is about 213.4539899062.

The spelling of 9725520 in words is "nine million, seven hundred twenty-five thousand, five hundred twenty".