1444121421 has 8 divisors (see below), whose sum is σ = 1926116640. Its totient is φ = 962436912.

The previous prime is 1444121407. The next prime is 1444121443. The reversal of 1444121421 is 1241214441.

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

It is not a de Polignac number, because 1444121421 - 2¹⁷ = 1443990349 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1444121391 and 1444121400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1444121621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66606 + ... + 85583.

It is an arithmetic number, because the mean of its divisors is an integer number (240764580).

Almost surely, 2^1444121421 is an apocalyptic number.

It is an amenable number.

1444121421 is a deficient number, since it is larger than the sum of its proper divisors (481995219).

1444121421 is a wasteful number, since it uses less digits than its factorization.

1444121421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155355.

The product of its digits is 1024, while the sum is 24.

The square root of 1444121421 is about 38001.5976111531. The cubic root of 1444121421 is about 1130.3195433788.

Adding to 1444121421 its reverse (1241214441), we get a palindrome (2685335862).

The spelling of 1444121421 in words is "one billion, four hundred forty-four million, one hundred twenty-one thousand, four hundred twenty-one".