9721504 has 24 divisors (see below), whose sum is σ = 20612340. Its totient is φ = 4486656.

The previous prime is 9721477. The next prime is 9721511. The reversal of 9721504 is 4051279.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 8133904 + 1587600 = 2852^2 + 1260^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11269 + ... + 12100.

Almost surely, 2^9721504 is an apocalyptic number.

It is an amenable number.

9721504 is an abundant number, since it is smaller than the sum of its proper divisors (10890836).

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

9721504 is a wasteful number, since it uses less digits than its factorization.

9721504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23392 (or 23384 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 9721504 is about 3117.9326484066. The cubic root of 9721504 is about 213.4246050423.

The spelling of 9721504 in words is "nine million, seven hundred twenty-one thousand, five hundred four".