2704221 has 24 divisors (see below), whose sum is σ = 4357080. Its totient is φ = 1604736.

The previous prime is 2704217. The next prime is 2704253. The reversal of 2704221 is 1224072.

2704221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 108900 + 2595321 = 330^2 + 1611^2 .

It is not a de Polignac number, because 2704221 - 2² = 2704217 is a prime.

It is a super-2 number, since 2×2704221² = 14625622433682, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2704194 and 2704203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2704291) 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 in 23 ways as a sum of consecutive naturals, for example, 2995 + ... + 3791.

It is an arithmetic number, because the mean of its divisors is an integer number (181545).

2^2704221 is an apocalyptic number.

It is an amenable number.

2704221 is a deficient number, since it is larger than the sum of its proper divisors (1652859).

2704221 is a wasteful number, since it uses less digits than its factorization.

2704221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 845 (or 842 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 18.

The square root of 2704221 is about 1644.4515803148. The cubic root of 2704221 is about 139.3201907330.

Adding to 2704221 its reverse (1224072), we get a palindrome (3928293).

The spelling of 2704221 in words is "two million, seven hundred four thousand, two hundred twenty-one".