6545321 has 2 divisors, whose sum is σ = 6545322. Its totient is φ = 6545320.

The previous prime is 6545303. The next prime is 6545347. The reversal of 6545321 is 1235456.

It is an a-pointer prime, because the next prime (6545347) can be obtained adding 6545321 to its sum of digits (26).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4752400 + 1792921 = 2180^2 + 1339^2 .

It is a cyclic number.

It is not a de Polignac number, because 6545321 - 2⁶ = 6545257 is a prime.

It is a super-3 number, since 3×6545321³ (a number of 21 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (6545351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3272660 + 3272661.

It is an arithmetic number, because the mean of its divisors is an integer number (3272661).

Almost surely, 2^6545321 is an apocalyptic number.

It is an amenable number.

6545321 is a deficient number, since it is larger than the sum of its proper divisors (1).

6545321 is an equidigital number, since it uses as much as digits as its factorization.

6545321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3600, while the sum is 26.

The square root of 6545321 is about 2558.3824968132. The cubic root of 6545321 is about 187.0583001422.

The spelling of 6545321 in words is "six million, five hundred forty-five thousand, three hundred twenty-one".