1081091 has 8 divisors (see below), whose sum is σ = 1220400. Its totient is φ = 948640.

The previous prime is 1081079. The next prime is 1081097. The reversal of 1081091 is 1901801.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1081091 - 2⁶ = 1081027 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1081097) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1376 + ... + 2013.

It is an arithmetic number, because the mean of its divisors is an integer number (152550).

2^1081091 is an apocalyptic number.

1081091 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1081091 is a deficient number, since it is larger than the sum of its proper divisors (139309).

1081091 is a wasteful number, since it uses less digits than its factorization.

1081091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3429.

The product of its (nonzero) digits is 72, while the sum is 20.

The square root of 1081091 is about 1039.7552596645. The cubic root of 1081091 is about 102.6330930213.

Adding to 1081091 its reverse (1901801), we get a palindrome (2982892).

It can be divided in two parts, 10810 and 91, that added together give a palindrome (10901).

The spelling of 1081091 in words is "one million, eighty-one thousand, ninety-one".