1080891 has 48 divisors (see below), whose sum is σ = 2006400. Its totient is φ = 571536.

The previous prime is 1080857. The next prime is 1080899. The reversal of 1080891 is 1980801.

It is not a de Polignac number, because 1080891 - 2⁷ = 1080763 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a taxicab number since it can be written as a sum of two cubes in more than one way. Here 1080891 = 27³ + 102³ = 48³ + 99³.

1080891 is a modest number, since divided by 891 gives 108 as remainder.

1080891 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1080899) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 25116 + ... + 25158.

It is an arithmetic number, because the mean of its divisors is an integer number (41800).

2^1080891 is an apocalyptic number.

1080891 is a deficient number, since it is larger than the sum of its proper divisors (925509).

1080891 is a wasteful number, since it uses less digits than its factorization.

1080891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85 (or 72 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 27.

The square root of 1080891 is about 1039.6590787369. The cubic root of 1080891 is about 102.6267636483.

The spelling of 1080891 in words is "one million, eighty thousand, eight hundred ninety-one".