7721532 has 72 divisors (see below), whose sum is σ = 24032736. Its totient is φ = 2035584.

The previous prime is 7721521. The next prime is 7721611. The reversal of 7721532 is 2351277.

It is a junction number, because it is equal to n+sod(n) for n = 7721496 and 7721505.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 2098 + ... + 4454.

It is an arithmetic number, because the mean of its divisors is an integer number (333788).

Almost surely, 2^7721532 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 7721532, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12016368).

7721532 is an abundant number, since it is smaller than the sum of its proper divisors (16311204).

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

7721532 is a wasteful number, since it uses less digits than its factorization.

7721532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2387 (or 2382 counting only the distinct ones).

The product of its digits is 2940, while the sum is 27.

The square root of 7721532 is about 2778.7644736465. The cubic root of 7721532 is about 197.6519751053.

It can be divided in two parts, 772 and 1532, that added together give a square (2304 = 48²).

The spelling of 7721532 in words is "seven million, seven hundred twenty-one thousand, five hundred thirty-two".