9120720 has 160 divisors (see below), whose sum is σ = 33212160. Its totient is φ = 2027520.

The previous prime is 9120701. The next prime is 9120739. The reversal of 9120720 is 270219.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (9120701) and next prime (9120739).

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

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 102436 + ... + 102524.

It is an arithmetic number, because the mean of its divisors is an integer number (207576).

Almost surely, 2^9120720 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 9120720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16606080).

9120720 is an abundant number, since it is smaller than the sum of its proper divisors (24091440).

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

9120720 is a wasteful number, since it uses less digits than its factorization.

9120720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173 (or 167 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 21.

The square root of 9120720 is about 3020.0529796677. The cubic root of 9120720 is about 208.9342833457.

Adding to 9120720 its reverse (270219), we get a palindrome (9390939).

The spelling of 9120720 in words is "nine million, one hundred twenty thousand, seven hundred twenty".