4418321 has 2 divisors, whose sum is σ = 4418322. Its totient is φ = 4418320.

The previous prime is 4418311. The next prime is 4418341. The reversal of 4418321 is 1238144.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2356225 + 2062096 = 1535^2 + 1436^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4418321 is a prime.

It is not a weakly prime, because it can be changed into another prime (4418311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2209160 + 2209161.

It is an arithmetic number, because the mean of its divisors is an integer number (2209161).

Almost surely, 2^4418321 is an apocalyptic number.

It is an amenable number.

4418321 is a deficient number, since it is larger than the sum of its proper divisors (1).

4418321 is an equidigital number, since it uses as much as digits as its factorization.

4418321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 768, while the sum is 23.

The square root of 4418321 is about 2101.9802568055. The cubic root of 4418321 is about 164.0913753137.

The spelling of 4418321 in words is "four million, four hundred eighteen thousand, three hundred twenty-one".