7532321 has 4 divisors (see below), whose sum is σ = 7537812. Its totient is φ = 7526832.

The previous prime is 7532299. The next prime is 7532323. The reversal of 7532321 is 1232357.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1232357 = 7 ⋅176051.

It can be written as a sum of positive squares in 2 ways, for example, as 4363921 + 3168400 = 2089^2 + 1780^2 .

It is a cyclic number.

It is not a de Polignac number, because 7532321 - 2¹⁰ = 7531297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7532323) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1295 + ... + 4091.

It is an arithmetic number, because the mean of its divisors is an integer number (1884453).

Almost surely, 2^7532321 is an apocalyptic number.

It is an amenable number.

7532321 is a deficient number, since it is larger than the sum of its proper divisors (5491).

7532321 is a wasteful number, since it uses less digits than its factorization.

7532321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5490.

The product of its digits is 1260, while the sum is 23.

The square root of 7532321 is about 2744.5074239287. The cubic root of 7532321 is about 196.0241622996.

Adding to 7532321 its reverse (1232357), we get a palindrome (8764678).

The spelling of 7532321 in words is "seven million, five hundred thirty-two thousand, three hundred twenty-one".