4189561 has 2 divisors, whose sum is σ = 4189562. Its totient is φ = 4189560.

The previous prime is 4189553. The next prime is 4189567. The reversal of 4189561 is 1659814.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2499561 + 1690000 = 1581^2 + 1300^2 .

It is a cyclic number.

It is not a de Polignac number, because 4189561 - 2³ = 4189553 is a prime.

It is not a weakly prime, because it can be changed into another prime (4189567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2094780 + 2094781.

It is an arithmetic number, because the mean of its divisors is an integer number (2094781).

Almost surely, 2^4189561 is an apocalyptic number.

It is an amenable number.

4189561 is a deficient number, since it is larger than the sum of its proper divisors (1).

4189561 is an equidigital number, since it uses as much as digits as its factorization.

4189561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 34.

The square root of 4189561 is about 2046.8417134698. The cubic root of 4189561 is about 161.2090824209.

The spelling of 4189561 in words is "four million, one hundred eighty-nine thousand, five hundred sixty-one".