2541221 has 4 divisors (see below), whose sum is σ = 2603244. Its totient is φ = 2479200.

The previous prime is 2541173. The next prime is 2541229. The reversal of 2541221 is 1221452.

2541221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 688900 + 1852321 = 830^2 + 1361^2 .

It is a cyclic number.

It is not a de Polignac number, because 2541221 - 2⁶ = 2541157 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2541221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2541229) 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 3 ways as a sum of consecutive naturals, for example, 30950 + ... + 31031.

It is an arithmetic number, because the mean of its divisors is an integer number (650811).

2^2541221 is an apocalyptic number.

It is an amenable number.

2541221 is a deficient number, since it is larger than the sum of its proper divisors (62023).

2541221 is an equidigital number, since it uses as much as digits as its factorization.

2541221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62022.

The product of its digits is 160, while the sum is 17.

The square root of 2541221 is about 1594.1207607957. The cubic root of 2541221 is about 136.4627582480.

Adding to 2541221 its reverse (1221452), we get a palindrome (3762673).

The spelling of 2541221 in words is "two million, five hundred forty-one thousand, two hundred twenty-one".