1080561 has 4 divisors (see below), whose sum is σ = 1440752. Its totient is φ = 720372.

The previous prime is 1080559. The next prime is 1080589. The reversal of 1080561 is 1650801.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1650801 = 3 ⋅550267.

It is not a de Polignac number, because 1080561 - 2¹ = 1080559 is a prime.

It is a super-2 number, since 2×1080561² = 2335224149442, which contains 22 as substring.

It is a D-number.

It is the 1040-th Hogben number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1080661) by changing a digit.

It is a nontrivial repunit in base 1039.

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 in 3 ways as a sum of consecutive naturals, for example, 180091 + ... + 180096.

It is an arithmetic number, because the mean of its divisors is an integer number (360188).

2^1080561 is an apocalyptic number.

It is an amenable number.

1080561 is a deficient number, since it is larger than the sum of its proper divisors (360191).

1080561 is an equidigital number, since it uses as much as digits as its factorization.

1080561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360190.

The product of its (nonzero) digits is 240, while the sum is 21.

The square root of 1080561 is about 1039.5003607503. The cubic root of 1080561 is about 102.6163184757.

Adding to 1080561 its product of nonzero digits (240), we get a palindrome (1080801).

The spelling of 1080561 in words is "one million, eighty thousand, five hundred sixty-one".