4266561 has 16 divisors (see below), whose sum is σ = 6325760. Its totient is φ = 2540160.

The previous prime is 4266557. The next prime is 4266593. The reversal of 4266561 is 1656624.

It is not a de Polignac number, because 4266561 - 2² = 4266557 is a prime.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a Curzon number.

4266561 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (4266511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 556 + ... + 2973.

It is an arithmetic number, because the mean of its divisors is an integer number (395360).

Almost surely, 2^4266561 is an apocalyptic number.

It is an amenable number.

4266561 is a deficient number, since it is larger than the sum of its proper divisors (2059199).

4266561 is a wasteful number, since it uses less digits than its factorization.

4266561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3576.

The product of its digits is 8640, while the sum is 30.

The square root of 4266561 is about 2065.5655399914. The cubic root of 4266561 is about 162.1907142750.

The spelling of 4266561 in words is "four million, two hundred sixty-six thousand, five hundred sixty-one".