1144391 has 4 divisors (see below), whose sum is σ = 1155000. Its totient is φ = 1133784.

The previous prime is 1144379. The next prime is 1144393. The reversal of 1144391 is 1934411.

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 1144391 - 2⁶ = 1144327 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 (1144393) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 5141 + ... + 5358.

It is an arithmetic number, because the mean of its divisors is an integer number (288750).

2^1144391 is an apocalyptic number.

1144391 is a deficient number, since it is larger than the sum of its proper divisors (10609).

1144391 is a wasteful number, since it uses less digits than its factorization.

1144391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10608.

The product of its digits is 432, while the sum is 23.

The square root of 1144391 is about 1069.7621230909. The cubic root of 1144391 is about 104.5983445735.

The spelling of 1144391 in words is "one million, one hundred forty-four thousand, three hundred ninety-one".