4394321 has 2 divisors, whose sum is σ = 4394322. Its totient is φ = 4394320.

The previous prime is 4394309. The next prime is 4394323. The reversal of 4394321 is 1234934.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3013696 + 1380625 = 1736^2 + 1175^2 .

It is a cyclic number.

It is not a de Polignac number, because 4394321 - 2²² = 200017 is a prime.

Together with 4394323, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (4394323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2197160 + 2197161.

It is an arithmetic number, because the mean of its divisors is an integer number (2197161).

Almost surely, 2^4394321 is an apocalyptic number.

4394321 is the 1121-st centered heptagonal number.

It is an amenable number.

4394321 is a deficient number, since it is larger than the sum of its proper divisors (1).

4394321 is an equidigital number, since it uses as much as digits as its factorization.

4394321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592, while the sum is 26.

The square root of 4394321 is about 2096.2635807551. The cubic root of 4394321 is about 163.7937248967.

The spelling of 4394321 in words is "four million, three hundred ninety-four thousand, three hundred twenty-one".