4394561 has 2 divisors, whose sum is σ = 4394562. Its totient is φ = 4394560.

The previous prime is 4394473. The next prime is 4394563. The reversal of 4394561 is 1654934.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3083536 + 1311025 = 1756^2 + 1145^2 .

It is a cyclic number.

It is not a de Polignac number, because 4394561 - 2²² = 200257 is a prime.

Together with 4394563, 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 (4394563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2197280 + 2197281.

It is an arithmetic number, because the mean of its divisors is an integer number (2197281).

Almost surely, 2^4394561 is an apocalyptic number.

It is an amenable number.

4394561 is a deficient number, since it is larger than the sum of its proper divisors (1).

4394561 is an equidigital number, since it uses as much as digits as its factorization.

4394561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12960, while the sum is 32.

The square root of 4394561 is about 2096.3208246831. The cubic root of 4394561 is about 163.7967067588.

The spelling of 4394561 in words is "four million, three hundred ninety-four thousand, five hundred sixty-one".