2191874 has 8 divisors (see below), whose sum is σ = 3294480. Its totient is φ = 1093716.

The previous prime is 2191873. The next prime is 2191883. The reversal of 2191874 is 4781912.

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

It is a self number, because there is not a number n which added to its sum of digits gives 2191874.

It is not an unprimeable number, because it can be changed into a prime (2191873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 737 + ... + 2219.

It is an arithmetic number, because the mean of its divisors is an integer number (411810).

2^2191874 is an apocalyptic number.

2191874 is a deficient number, since it is larger than the sum of its proper divisors (1102606).

2191874 is a wasteful number, since it uses less digits than its factorization.

2191874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2224.

The product of its digits is 4032, while the sum is 32.

The square root of 2191874 is about 1480.4978892251. The cubic root of 2191874 is about 129.8988167297.

The spelling of 2191874 in words is "two million, one hundred ninety-one thousand, eight hundred seventy-four".