2191241 has 8 divisors (see below), whose sum is σ = 2393160. Its totient is φ = 1994112.

The previous prime is 2191229. The next prime is 2191243. The reversal of 2191241 is 1421912.

2191241 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 355216 + 1836025 = 596^2 + 1355^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 2191241 - 2¹⁰ = 2190217 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2191243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 206 + ... + 2103.

It is an arithmetic number, because the mean of its divisors is an integer number (299145).

2^2191241 is an apocalyptic number.

It is an amenable number.

2191241 is a deficient number, since it is larger than the sum of its proper divisors (201919).

2191241 is a wasteful number, since it uses less digits than its factorization.

2191241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2395.

The product of its digits is 144, while the sum is 20.

The square root of 2191241 is about 1480.2840943549. The cubic root of 2191241 is about 129.8863108606.

The spelling of 2191241 in words is "two million, one hundred ninety-one thousand, two hundred forty-one".