7271321 has 2 divisors, whose sum is σ = 7271322. Its totient is φ = 7271320.

The previous prime is 7271317. The next prime is 7271387. The reversal of 7271321 is 1231727.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6574096 + 697225 = 2564^2 + 835^2 .

It is a cyclic number.

It is not a de Polignac number, because 7271321 - 2² = 7271317 is a prime.

It is not a weakly prime, because it can be changed into another prime (7271221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3635660 + 3635661.

It is an arithmetic number, because the mean of its divisors is an integer number (3635661).

Almost surely, 2^7271321 is an apocalyptic number.

It is an amenable number.

7271321 is a deficient number, since it is larger than the sum of its proper divisors (1).

7271321 is an equidigital number, since it uses as much as digits as its factorization.

7271321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 588, while the sum is 23.

The square root of 7271321 is about 2696.5387073061. The cubic root of 7271321 is about 193.7333726973.

It can be divided in two parts, 727 and 1321, that added together give a 11-th power (2048 = 2¹¹).

The spelling of 7271321 in words is "seven million, two hundred seventy-one thousand, three hundred twenty-one".