8401321 has 2 divisors, whose sum is σ = 8401322. Its totient is φ = 8401320.

The previous prime is 8401313. The next prime is 8401339. The reversal of 8401321 is 1231048.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4260096 + 4141225 = 2064^2 + 2035^2 .

It is a cyclic number.

It is not a de Polignac number, because 8401321 - 2³ = 8401313 is a prime.

It is not a weakly prime, because it can be changed into another prime (8401301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4200660 + 4200661.

It is an arithmetic number, because the mean of its divisors is an integer number (4200661).

Almost surely, 2^8401321 is an apocalyptic number.

It is an amenable number.

8401321 is a deficient number, since it is larger than the sum of its proper divisors (1).

8401321 is an equidigital number, since it uses as much as digits as its factorization.

8401321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 8401321 is about 2898.5032344298. The cubic root of 8401321 is about 203.2899268329.

Adding to 8401321 its reverse (1231048), we get a palindrome (9632369).

The spelling of 8401321 in words is "eight million, four hundred one thousand, three hundred twenty-one".