2266561 has 4 divisors (see below), whose sum is σ = 2472624. Its totient is φ = 2060500.

The previous prime is 2266549. The next prime is 2266571. The reversal of 2266561 is 1656622.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2266561 - 2¹¹ = 2264513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2266501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103015 + ... + 103036.

It is an arithmetic number, because the mean of its divisors is an integer number (618156).

2^2266561 is an apocalyptic number.

It is an amenable number.

2266561 is a deficient number, since it is larger than the sum of its proper divisors (206063).

2266561 is a wasteful number, since it uses less digits than its factorization.

2266561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206062.

The product of its digits is 4320, while the sum is 28.

The square root of 2266561 is about 1505.5102125193. The cubic root of 2266561 is about 131.3577811571.

The spelling of 2266561 in words is "two million, two hundred sixty-six thousand, five hundred sixty-one".