4398561 has 6 divisors (see below), whose sum is σ = 6353490. Its totient is φ = 2932368.

The previous prime is 4398553. The next prime is 4398571. The reversal of 4398561 is 1658934.

4398561 is a `hidden beast` number, since 4 + 3 + 98 + 561 = 666.

It can be written as a sum of positive squares in only one way, i.e., 3459600 + 938961 = 1860^2 + 969^2 .

It is not a de Polignac number, because 4398561 - 2³ = 4398553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4398571) 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 5 ways as a sum of consecutive naturals, for example, 244356 + ... + 244373.

It is an arithmetic number, because the mean of its divisors is an integer number (1058915).

Almost surely, 2^4398561 is an apocalyptic number.

It is an amenable number.

4398561 is a deficient number, since it is larger than the sum of its proper divisors (1954929).

4398561 is a wasteful number, since it uses less digits than its factorization.

4398561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 488735 (or 488732 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 4398561 is about 2097.2746601244. The cubic root of 4398561 is about 163.8463884859.

The spelling of 4398561 in words is "four million, three hundred ninety-eight thousand, five hundred sixty-one".