1080861 has 4 divisors (see below), whose sum is σ = 1441152. Its totient is φ = 720572.

The previous prime is 1080857. The next prime is 1080899. The reversal of 1080861 is 1680801.

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 1080861 - 2² = 1080857 is a prime.

It is a D-number.

1080861 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1080811) 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 in 3 ways as a sum of consecutive naturals, for example, 180141 + ... + 180146.

It is an arithmetic number, because the mean of its divisors is an integer number (360288).

2^1080861 is an apocalyptic number.

It is an amenable number.

1080861 is a deficient number, since it is larger than the sum of its proper divisors (360291).

1080861 is an equidigital number, since it uses as much as digits as its factorization.

1080861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360290.

The product of its (nonzero) digits is 384, while the sum is 24.

The square root of 1080861 is about 1039.6446508303. The cubic root of 1080861 is about 102.6258141750.

The spelling of 1080861 in words is "one million, eighty thousand, eight hundred sixty-one".