4228561 has 2 divisors, whose sum is σ = 4228562. Its totient is φ = 4228560.

The previous prime is 4228559. The next prime is 4228591. The reversal of 4228561 is 1658224.

It is the 840-th star number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4177936 + 50625 = 2044^2 + 225^2 .

It is a cyclic number.

It is not a de Polignac number, because 4228561 - 2¹ = 4228559 is a prime.

Together with 4228559, it forms a pair of twin primes.

4228561 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (4228501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2114280 + 2114281.

It is an arithmetic number, because the mean of its divisors is an integer number (2114281).

Almost surely, 2^4228561 is an apocalyptic number.

It is an amenable number.

4228561 is a deficient number, since it is larger than the sum of its proper divisors (1).

4228561 is an equidigital number, since it uses as much as digits as its factorization.

4228561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3840, while the sum is 28.

The square root of 4228561 is about 2056.3465174916. The cubic root of 4228561 is about 161.7077620165.

The spelling of 4228561 in words is "four million, two hundred twenty-eight thousand, five hundred sixty-one".