2191142 has 16 divisors (see below), whose sum is σ = 3456000. Its totient is φ = 1040520.

The previous prime is 2191127. The next prime is 2191159. The reversal of 2191142 is 2411912.

2191142 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×2191142² = 9602206528328, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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, 3359 + ... + 3957.

It is an arithmetic number, because the mean of its divisors is an integer number (216000).

2^2191142 is an apocalyptic number.

2191142 is a deficient number, since it is larger than the sum of its proper divisors (1264858).

2191142 is a wasteful number, since it uses less digits than its factorization.

2191142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 691.

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

The square root of 2191142 is about 1480.2506544501. The cubic root of 2191142 is about 129.8843547486.

The spelling of 2191142 in words is "two million, one hundred ninety-one thousand, one hundred forty-two".