1091241 has 24 divisors (see below), whose sum is σ = 1689480. Its totient is φ = 677376.

The previous prime is 1091239. The next prime is 1091243. The reversal of 1091241 is 1421901.

It is an interprime number because it is at equal distance from previous prime (1091239) and next prime (1091243).

It can be written as a sum of positive squares in 4 ways, for example, as 99225 + 992016 = 315^2 + 996^2 .

It is not a de Polignac number, because 1091241 - 2¹ = 1091239 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1091243) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9601 + ... + 9713.

It is an arithmetic number, because the mean of its divisors is an integer number (70395).

2^1091241 is an apocalyptic number.

It is an amenable number.

1091241 is a deficient number, since it is larger than the sum of its proper divisors (598239).

1091241 is a wasteful number, since it uses less digits than its factorization.

1091241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185 (or 182 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 1091241 is about 1044.6248130310. The cubic root of 1091241 is about 102.9532889021.

The spelling of 1091241 in words is "one million, ninety-one thousand, two hundred forty-one".