65461321 has 2 divisors, whose sum is σ = 65461322. Its totient is φ = 65461320.

The previous prime is 65461313. The next prime is 65461337. The reversal of 65461321 is 12316456.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63027721 + 2433600 = 7939^2 + 1560^2 .

It is a cyclic number.

It is not a de Polignac number, because 65461321 - 2³ = 65461313 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 65461321.

It is not a weakly prime, because it can be changed into another prime (65461301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32730660 + 32730661.

It is an arithmetic number, because the mean of its divisors is an integer number (32730661).

Almost surely, 2^65461321 is an apocalyptic number.

It is an amenable number.

65461321 is a deficient number, since it is larger than the sum of its proper divisors (1).

65461321 is an equidigital number, since it uses as much as digits as its factorization.

65461321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4320, while the sum is 28.

The square root of 65461321 is about 8090.8170786392. The cubic root of 65461321 is about 403.0215370642.

Adding to 65461321 its reverse (12316456), we get a palindrome (77777777).

The spelling of 65461321 in words is "sixty-five million, four hundred sixty-one thousand, three hundred twenty-one".