1001091 has 32 divisors (see below), whose sum is σ = 1738240. Its totient is φ = 497664.

The previous prime is 1001089. The next prime is 1001093. The reversal of 1001091 is 1901001.

1001091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (1001089) and next prime (1001093).

It is not a de Polignac number, because 1001091 - 2¹ = 1001089 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001093) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5091 + ... + 5283.

It is an arithmetic number, because the mean of its divisors is an integer number (54320).

2^1001091 is an apocalyptic number.

1001091 is a deficient number, since it is larger than the sum of its proper divisors (737149).

1001091 is a wasteful number, since it uses less digits than its factorization.

1001091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235.

The product of its (nonzero) digits is 9, while the sum is 12.

The square root of 1001091 is about 1000.5453512960. The cubic root of 1001091 is about 100.0363534493.

Adding to 1001091 its reverse (1901001), we get a palindrome (2902092).

It can be divided in two parts, 10010 and 91, that added together give a palindrome (10101).

The spelling of 1001091 in words is "one million, one thousand, ninety-one".