1444428121 has 2 divisors, whose sum is σ = 1444428122. Its totient is φ = 1444428120.

The previous prime is 1444428119. The next prime is 1444428173. The reversal of 1444428121 is 1218244441.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 808833600 + 635594521 = 28440^2 + 25211^2 .

It is a cyclic number.

It is not a de Polignac number, because 1444428121 - 2¹ = 1444428119 is a prime.

Together with 1444428119, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1444428101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 722214060 + 722214061.

It is an arithmetic number, because the mean of its divisors is an integer number (722214061).

Almost surely, 2^1444428121 is an apocalyptic number.

It is an amenable number.

1444428121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1444428121 is an equidigital number, since it uses as much as digits as its factorization.

1444428121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8192, while the sum is 31.

The square root of 1444428121 is about 38005.6327535801. The cubic root of 1444428121 is about 1130.3995561488.

The spelling of 1444428121 in words is "one billion, four hundred forty-four million, four hundred twenty-eight thousand, one hundred twenty-one".