1091085 has 8 divisors (see below), whose sum is σ = 1745760. Its totient is φ = 581904.

The previous prime is 1091071. The next prime is 1091119. The reversal of 1091085 is 5801901.

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

It is not a de Polignac number, because 1091085 - 2⁵ = 1091053 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36355 + ... + 36384.

It is an arithmetic number, because the mean of its divisors is an integer number (218220).

2^1091085 is an apocalyptic number.

1091085 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1091085 is a deficient number, since it is larger than the sum of its proper divisors (654675).

1091085 is an equidigital number, since it uses as much as digits as its factorization.

1091085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72747.

The product of its (nonzero) digits is 360, while the sum is 24.

The square root of 1091085 is about 1044.5501424058. The cubic root of 1091085 is about 102.9483827208.

Adding to 1091085 its reverse (5801901), we get a palindrome (6892986).

The spelling of 1091085 in words is "one million, ninety-one thousand, eighty-five".