1144424021 has 8 divisors (see below), whose sum is σ = 1262517144. Its totient is φ = 1030625280.

The previous prime is 1144423999. The next prime is 1144424077. The reversal of 1144424021 is 1204244411.

It can be written as a sum of positive squares in 4 ways, for example, as 21436900 + 1122987121 = 4630^2 + 33511^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1144424021 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1144424081) 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 7 ways as a sum of consecutive naturals, for example, 1073036 + ... + 1074101.

It is an arithmetic number, because the mean of its divisors is an integer number (157814643).

Almost surely, 2^1144424021 is an apocalyptic number.

It is an amenable number.

1144424021 is a deficient number, since it is larger than the sum of its proper divisors (118093123).

1144424021 is a wasteful number, since it uses less digits than its factorization.

1144424021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2147191.

The product of its (nonzero) digits is 1024, while the sum is 23.

The square root of 1144424021 is about 33829.3366916941. The cubic root of 1144424021 is about 1045.9935061327.

Adding to 1144424021 its reverse (1204244411), we get a palindrome (2348668432).

The spelling of 1144424021 in words is "one billion, one hundred forty-four million, four hundred twenty-four thousand, twenty-one".