1096561 has 2 divisors, whose sum is σ = 1096562. Its totient is φ = 1096560.

The previous prime is 1096559. The next prime is 1096583. The reversal of 1096561 is 1656901.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 960400 + 136161 = 980^2 + 369^2 .

It is an emirp because it is prime and its reverse (1656901) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1096561 - 2¹ = 1096559 is a prime.

Together with 1096559, it forms a pair of twin primes.

It is an alternating number because its digits alternate between odd and even.

1096561 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (1096541) 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 as a sum of consecutive naturals, namely, 548280 + 548281.

It is an arithmetic number, because the mean of its divisors is an integer number (548281).

2^1096561 is an apocalyptic number.

It is an amenable number.

1096561 is a deficient number, since it is larger than the sum of its proper divisors (1).

1096561 is an equidigital number, since it uses as much as digits as its factorization.

1096561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 1096561 is about 1047.1680858391. The cubic root of 1096561 is about 103.1203231427.

It can be divided in two parts, 10965 and 61, that added together give a triangular number (11026 = T₁₄₈).

The spelling of 1096561 in words is "one million, ninety-six thousand, five hundred sixty-one".