1081911 has 4 divisors (see below), whose sum is σ = 1442552. Its totient is φ = 721272.

The previous prime is 1081907. The next prime is 1081919. The reversal of 1081911 is 1191801.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1081911 - 2² = 1081907 is a prime.

It is a D-number.

It is a Duffinian number.

1081911 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1081919) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 180316 + ... + 180321.

It is an arithmetic number, because the mean of its divisors is an integer number (360638).

2^1081911 is an apocalyptic number.

1081911 is a deficient number, since it is larger than the sum of its proper divisors (360641).

1081911 is an equidigital number, since it uses as much as digits as its factorization.

1081911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360640.

The product of its (nonzero) digits is 72, while the sum is 21.

The square root of 1081911 is about 1040.1495084842. The cubic root of 1081911 is about 102.6590352923.

The spelling of 1081911 in words is "one million, eighty-one thousand, nine hundred eleven".