2191145 has 8 divisors (see below), whose sum is σ = 2868480. Its totient is φ = 1593520.

The previous prime is 2191127. The next prime is 2191159. The reversal of 2191145 is 5411912.

It is a happy number.

2191145 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 2191145 - 2¹² = 2187049 is a prime.

It is a super-2 number, since 2×2191145² = 9602232822050, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2191145.

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, 19865 + ... + 19974.

It is an arithmetic number, because the mean of its divisors is an integer number (358560).

2^2191145 is an apocalyptic number.

It is an amenable number.

2191145 is a deficient number, since it is larger than the sum of its proper divisors (677335).

2191145 is a wasteful number, since it uses less digits than its factorization.

2191145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39855.

The product of its digits is 360, while the sum is 23.

The square root of 2191145 is about 1480.2516677917. The cubic root of 2191145 is about 129.8844140256.

The spelling of 2191145 in words is "two million, one hundred ninety-one thousand, one hundred forty-five".