1404144221 has 2 divisors, whose sum is σ = 1404144222. Its totient is φ = 1404144220.

The previous prime is 1404144149. The next prime is 1404144229. The reversal of 1404144221 is 1224414041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1245031225 + 159112996 = 35285^2 + 12614^2 .

It is an emirp because it is prime and its reverse (1224414041) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1404144221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1404144229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 702072110 + 702072111.

It is an arithmetic number, because the mean of its divisors is an integer number (702072111).

Almost surely, 2^1404144221 is an apocalyptic number.

It is an amenable number.

1404144221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1404144221 is an equidigital number, since it uses as much as digits as its factorization.

1404144221 is an evil number, because the sum of its binary digits is even.

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

The square root of 1404144221 is about 37471.9124278439. The cubic root of 1404144221 is about 1119.7916866506.

Adding to 1404144221 its reverse (1224414041), we get a palindrome (2628558262).

The spelling of 1404144221 in words is "one billion, four hundred four million, one hundred forty-four thousand, two hundred twenty-one".