65001321 has 36 divisors (see below), whose sum is σ = 117959296. Its totient is φ = 33762960.

The previous prime is 65001301. The next prime is 65001361. The reversal of 65001321 is 12310056.

65001321 is a `hidden beast` number, since 650 + 0 + 13 + 2 + 1 = 666.

It is not a de Polignac number, because 65001321 - 2⁶ = 65001257 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 65001294 and 65001303.

It is not an unprimeable number, because it can be changed into a prime (65001301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 3360 + ... + 11886.

Almost surely, 2^65001321 is an apocalyptic number.

It is an amenable number.

65001321 is a deficient number, since it is larger than the sum of its proper divisors (52957975).

65001321 is a wasteful number, since it uses less digits than its factorization.

65001321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8562 (or 8548 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 65001321 is about 8062.3396728245. The cubic root of 65001321 is about 402.0752996244.

Adding to 65001321 its reverse (12310056), we get a palindrome (77311377).

The spelling of 65001321 in words is "sixty-five million, one thousand, three hundred twenty-one".