2191267 has 4 divisors (see below), whose sum is σ = 2359840. Its totient is φ = 2022696.

The previous prime is 2191261. The next prime is 2191291. The reversal of 2191267 is 7621912.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2191267 - 2¹¹ = 2189219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2191261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84267 + ... + 84292.

It is an arithmetic number, because the mean of its divisors is an integer number (589960).

2^2191267 is an apocalyptic number.

2191267 is a deficient number, since it is larger than the sum of its proper divisors (168573).

2191267 is a wasteful number, since it uses less digits than its factorization.

2191267 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168572.

The product of its digits is 1512, while the sum is 28.

The square root of 2191267 is about 1480.2928764268. The cubic root of 2191267 is about 129.8868245772.

The spelling of 2191267 in words is "two million, one hundred ninety-one thousand, two hundred sixty-seven".