1144021243 has 4 divisors (see below), whose sum is σ = 1155348288. Its totient is φ = 1132694200.

The previous prime is 1144021187. The next prime is 1144021327. The reversal of 1144021243 is 3421204411.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1144021243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1144021343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5663371 + ... + 5663572.

It is an arithmetic number, because the mean of its divisors is an integer number (288837072).

Almost surely, 2^1144021243 is an apocalyptic number.

1144021243 is a deficient number, since it is larger than the sum of its proper divisors (11327045).

1144021243 is a wasteful number, since it uses less digits than its factorization.

1144021243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11327044.

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 1144021243 is about 33823.3830803484. The cubic root of 1144021243 is about 1045.8707798821.

Adding to 1144021243 its reverse (3421204411), we get a palindrome (4565225654).

The spelling of 1144021243 in words is "one billion, one hundred forty-four million, twenty-one thousand, two hundred forty-three".