2577221 has 2 divisors, whose sum is σ = 2577222. Its totient is φ = 2577220.

The previous prime is 2577203. The next prime is 2577241. The reversal of 2577221 is 1227752.

2577221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2102500 + 474721 = 1450^2 + 689^2 .

It is a cyclic number.

It is not a de Polignac number, because 2577221 - 2¹⁴ = 2560837 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2577241) 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, 1288610 + 1288611.

It is an arithmetic number, because the mean of its divisors is an integer number (1288611).

2^2577221 is an apocalyptic number.

It is an amenable number.

2577221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2577221 is an equidigital number, since it uses as much as digits as its factorization.

2577221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1960, while the sum is 26.

The square root of 2577221 is about 1605.3725424337. The cubic root of 2577221 is about 137.1041352217.

The spelling of 2577221 in words is "two million, five hundred seventy-seven thousand, two hundred twenty-one".