2306561 has 2 divisors, whose sum is σ = 2306562. Its totient is φ = 2306560.

The previous prime is 2306531. The next prime is 2306567. The reversal of 2306561 is 1656032.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1336336 + 970225 = 1156^2 + 985^2 .

It is a cyclic number.

It is not a de Polignac number, because 2306561 - 2¹⁴ = 2290177 is a prime.

It is not a weakly prime, because it can be changed into another prime (2306567) 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 as a sum of consecutive naturals, namely, 1153280 + 1153281.

It is an arithmetic number, because the mean of its divisors is an integer number (1153281).

2^2306561 is an apocalyptic number.

It is an amenable number.

2306561 is a deficient number, since it is larger than the sum of its proper divisors (1).

2306561 is an equidigital number, since it uses as much as digits as its factorization.

2306561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 2306561 is about 1518.7366460318. The cubic root of 2306561 is about 132.1260083843.

The spelling of 2306561 in words is "two million, three hundred six thousand, five hundred sixty-one".