6416321 has 2 divisors, whose sum is σ = 6416322. Its totient is φ = 6416320.

The previous prime is 6416317. The next prime is 6416329. The reversal of 6416321 is 1236146.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4456321 + 1960000 = 2111^2 + 1400^2 .

It is a cyclic number.

It is not a de Polignac number, because 6416321 - 2² = 6416317 is a prime.

It is a Chen prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (6416329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3208160 + 3208161.

It is an arithmetic number, because the mean of its divisors is an integer number (3208161).

Almost surely, 2^6416321 is an apocalyptic number.

It is an amenable number.

6416321 is a deficient number, since it is larger than the sum of its proper divisors (1).

6416321 is an equidigital number, since it uses as much as digits as its factorization.

6416321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 23.

The square root of 6416321 is about 2533.0457950854. The cubic root of 6416321 is about 185.8212430662.

The spelling of 6416321 in words is "six million, four hundred sixteen thousand, three hundred twenty-one".