4221577 has 2 divisors, whose sum is σ = 4221578. Its totient is φ = 4221576.

The previous prime is 4221571. The next prime is 4221583. The reversal of 4221577 is 7751224.

It is a balanced prime because it is at equal distance from previous prime (4221571) and next prime (4221583).

It can be written as a sum of positive squares in only one way, i.e., 3825936 + 395641 = 1956^2 + 629^2 .

It is a cyclic number.

It is not a de Polignac number, because 4221577 - 2⁷ = 4221449 is a prime.

It is a Chen prime.

4221577 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (4221571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2110788 + 2110789.

It is an arithmetic number, because the mean of its divisors is an integer number (2110789).

Almost surely, 2^4221577 is an apocalyptic number.

It is an amenable number.

4221577 is a deficient number, since it is larger than the sum of its proper divisors (1).

4221577 is an equidigital number, since it uses as much as digits as its factorization.

4221577 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3920, while the sum is 28.

The square root of 4221577 is about 2054.6476583590. The cubic root of 4221577 is about 161.6186860601.

The spelling of 4221577 in words is "four million, two hundred twenty-one thousand, five hundred seventy-seven".