2042191 has 4 divisors (see below), whose sum is σ = 2047032. Its totient is φ = 2037352.

The previous prime is 2042189. The next prime is 2042203. The reversal of 2042191 is 1912402.

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 2042191 - 2¹ = 2042189 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 (2042111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1720 + ... + 2653.

It is an arithmetic number, because the mean of its divisors is an integer number (511758).

2^2042191 is an apocalyptic number.

2042191 is a deficient number, since it is larger than the sum of its proper divisors (4841).

2042191 is an equidigital number, since it uses as much as digits as its factorization.

2042191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4840.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 2042191 is about 1429.0524832909. The cubic root of 2042191 is about 126.8719025832.

Adding to 2042191 its reverse (1912402), we get a palindrome (3954593).

The spelling of 2042191 in words is "two million, forty-two thousand, one hundred ninety-one".