2289561 has 8 divisors (see below), whose sum is σ = 3068064. Its totient is φ = 1518720.

The previous prime is 2289503. The next prime is 2289571. The reversal of 2289561 is 1659822.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2289561 - 2⁷ = 2289433 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2289571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1176 + ... + 2441.

It is an arithmetic number, because the mean of its divisors is an integer number (383508).

2^2289561 is an apocalyptic number.

It is an amenable number.

2289561 is a deficient number, since it is larger than the sum of its proper divisors (778503).

2289561 is a wasteful number, since it uses less digits than its factorization.

2289561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3831.

The product of its digits is 8640, while the sum is 33.

The square root of 2289561 is about 1513.1295384071. The cubic root of 2289561 is about 131.8006057494.

It can be divided in two parts, 2289 and 561, that added together give a triangular number (2850 = T₇₅).

The spelling of 2289561 in words is "two million, two hundred eighty-nine thousand, five hundred sixty-one".