7275321 has 6 divisors (see below), whose sum is σ = 10508810. Its totient is φ = 4850208.

The previous prime is 7275313. The next prime is 7275353. The reversal of 7275321 is 1235727.

It can be written as a sum of positive squares in only one way, i.e., 4247721 + 3027600 = 2061^2 + 1740^2 .

It is not a de Polignac number, because 7275321 - 2³ = 7275313 is a prime.

It is a super-3 number, since 3×7275321³ (a number of 22 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7275311) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 404176 + ... + 404193.

Almost surely, 2^7275321 is an apocalyptic number.

It is an amenable number.

7275321 is a deficient number, since it is larger than the sum of its proper divisors (3233489).

7275321 is a wasteful number, since it uses less digits than its factorization.

7275321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 808375 (or 808372 counting only the distinct ones).

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

The square root of 7275321 is about 2697.2802968917. The cubic root of 7275321 is about 193.7688908393.

The spelling of 7275321 in words is "seven million, two hundred seventy-five thousand, three hundred twenty-one".