1444004421 has 4 divisors (see below), whose sum is σ = 1925339232. Its totient is φ = 962669612.

The previous prime is 1444004407. The next prime is 1444004437. The reversal of 1444004421 is 1244004441.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1244004441 = 3 ⋅414668147.

It is a cyclic number.

It is not a de Polignac number, because 1444004421 - 2¹⁰ = 1444003397 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1444004391 and 1444004400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1444004491) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 240667401 + ... + 240667406.

It is an arithmetic number, because the mean of its divisors is an integer number (481334808).

Almost surely, 2^1444004421 is an apocalyptic number.

It is an amenable number.

1444004421 is a deficient number, since it is larger than the sum of its proper divisors (481334811).

1444004421 is an equidigital number, since it uses as much as digits as its factorization.

1444004421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 481334810.

The product of its (nonzero) digits is 2048, while the sum is 24.

The square root of 1444004421 is about 38000.0581710081. The cubic root of 1444004421 is about 1130.2890171003.

Adding to 1444004421 its reverse (1244004441), we get a palindrome (2688008862).

The spelling of 1444004421 in words is "one billion, four hundred forty-four million, four thousand, four hundred twenty-one".