1091121 has 8 divisors (see below), whose sum is σ = 1460064. Its totient is φ = 724800.

The previous prime is 1091119. The next prime is 1091137. The reversal of 1091121 is 1211901.

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

It is not a de Polignac number, because 1091121 - 2¹ = 1091119 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1091121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1091161) 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, 750 + ... + 1656.

It is an arithmetic number, because the mean of its divisors is an integer number (182508).

2^1091121 is an apocalyptic number.

It is an amenable number.

1091121 is a deficient number, since it is larger than the sum of its proper divisors (368943).

1091121 is an equidigital number, since it uses as much as digits as its factorization.

1091121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1311.

The product of its (nonzero) digits is 18, while the sum is 15.

The square root of 1091121 is about 1044.5673745623. The cubic root of 1091121 is about 102.9495149580.

The spelling of 1091121 in words is "one million, ninety-one thousand, one hundred twenty-one".