4994221 has 2 divisors, whose sum is σ = 4994222. Its totient is φ = 4994220.

The previous prime is 4994219. The next prime is 4994233. The reversal of 4994221 is 1224994.

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., 4791721 + 202500 = 2189^2 + 450^2 .

It is a cyclic number.

It is not a de Polignac number, because 4994221 - 2¹ = 4994219 is a prime.

Together with 4994219, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4994621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2497110 + 2497111.

It is an arithmetic number, because the mean of its divisors is an integer number (2497111).

Almost surely, 2^4994221 is an apocalyptic number.

It is an amenable number.

4994221 is a deficient number, since it is larger than the sum of its proper divisors (1).

4994221 is an equidigital number, since it uses as much as digits as its factorization.

4994221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 31.

The square root of 4994221 is about 2234.7753802116. The cubic root of 4994221 is about 170.9316895968.

The spelling of 4994221 in words is "four million, nine hundred ninety-four thousand, two hundred twenty-one".