1091131 has 4 divisors (see below), whose sum is σ = 1106152. Its totient is φ = 1076112.

The previous prime is 1091119. The next prime is 1091137. The reversal of 1091131 is 1311901.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1091131 - 2⁷ = 1091003 is a prime.

It is a super-2 number, since 2×1091131² = 2381133718322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1091137) 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, 7401 + ... + 7546.

It is an arithmetic number, because the mean of its divisors is an integer number (276538).

2^1091131 is an apocalyptic number.

1091131 is a deficient number, since it is larger than the sum of its proper divisors (15021).

1091131 is an equidigital number, since it uses as much as digits as its factorization.

1091131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15020.

The product of its (nonzero) digits is 27, while the sum is 16.

The square root of 1091131 is about 1044.5721612220. The cubic root of 1091131 is about 102.9498294639.

The spelling of 1091131 in words is "one million, ninety-one thousand, one hundred thirty-one".