7270321 has 4 divisors (see below), whose sum is σ = 7352100. Its totient is φ = 7188544.

The previous prime is 7270309. The next prime is 7270327. The reversal of 7270321 is 1230727.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4260096 + 3010225 = 2064^2 + 1735^2 .

It is a cyclic number.

It is not a de Polignac number, because 7270321 - 2¹⁵ = 7237553 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7270292 and 7270301.

It is not an unprimeable number, because it can be changed into a prime (7270327) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40756 + ... + 40933.

It is an arithmetic number, because the mean of its divisors is an integer number (1838025).

Almost surely, 2^7270321 is an apocalyptic number.

It is an amenable number.

7270321 is a deficient number, since it is larger than the sum of its proper divisors (81779).

7270321 is an equidigital number, since it uses as much as digits as its factorization.

7270321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81778.

The product of its (nonzero) digits is 588, while the sum is 22.

The square root of 7270321 is about 2696.3532780405. The cubic root of 7270321 is about 193.7244911266.

The spelling of 7270321 in words is "seven million, two hundred seventy thousand, three hundred twenty-one".