1144430021 has 64 divisors (see below), whose sum is σ = 1551052800. Its totient is φ = 820233216.

The previous prime is 1144430003. The next prime is 1144430041. The reversal of 1144430021 is 1200344411.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1144430021 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1144429975 and 1144430002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1144430041) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3067991 + ... + 3068363.

It is an arithmetic number, because the mean of its divisors is an integer number (24235200).

Almost surely, 2^1144430021 is an apocalyptic number.

It is an amenable number.

1144430021 is a deficient number, since it is larger than the sum of its proper divisors (406622779).

1144430021 is a wasteful number, since it uses less digits than its factorization.

1144430021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 498.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 1144430021 is about 33829.4253720042. The cubic root of 1144430021 is about 1045.9953341119.

Adding to 1144430021 its reverse (1200344411), we get a palindrome (2344774432).

The spelling of 1144430021 in words is "one billion, one hundred forty-four million, four hundred thirty thousand, twenty-one".