70321 has 2 divisors, whose sum is σ = 70322. Its totient is φ = 70320.

The previous prime is 70313. The next prime is 70327. The reversal of 70321 is 12307.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69696 + 625 = 264^2 + 25^2 .

It is a cyclic number.

It is not a de Polignac number, because 70321 - 2³ = 70313 is a prime.

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

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 70321.

It is not a weakly prime, because it can be changed into another prime (70327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35160 + 35161.

It is an arithmetic number, because the mean of its divisors is an integer number (35161).

2⁷⁰³²¹ is an apocalyptic number.

It is an amenable number.

70321 is a deficient number, since it is larger than the sum of its proper divisors (1).

70321 is an equidigital number, since it uses as much as digits as its factorization.

70321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 42, while the sum is 13.

The square root of 70321 is about 265.1810702143. The cubic root of 70321 is about 41.2757537372.

Adding to 70321 its reverse (12307), we get a palindrome (82628).

The spelling of 70321 in words is "seventy thousand, three hundred twenty-one", and thus it is an iban number.