2744221 has 4 divisors (see below), whose sum is σ = 2782944. Its totient is φ = 2705500.

The previous prime is 2744197. The next prime is 2744233. The reversal of 2744221 is 1224472.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2744221 - 2⁹ = 2743709 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2744192 and 2744201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2744921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19255 + ... + 19396.

It is an arithmetic number, because the mean of its divisors is an integer number (695736).

2^2744221 is an apocalyptic number.

It is an amenable number.

2744221 is a deficient number, since it is larger than the sum of its proper divisors (38723).

2744221 is an equidigital number, since it uses as much as digits as its factorization.

2744221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38722.

The product of its digits is 896, while the sum is 22.

The square root of 2744221 is about 1656.5690447428. The cubic root of 2744221 is about 140.0037584025.

Adding to 2744221 its reverse (1224472), we get a palindrome (3968693).

The spelling of 2744221 in words is "two million, seven hundred forty-four thousand, two hundred twenty-one".