144440521 has 2 divisors, whose sum is σ = 144440522. Its totient is φ = 144440520.

The previous prime is 144440479. The next prime is 144440531. The reversal of 144440521 is 125044441.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 144264121 + 176400 = 12011^2 + 420^2 .

It is an emirp because it is prime and its reverse (125044441) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 144440521 - 2⁷ = 144440393 is a prime.

It is not a weakly prime, because it can be changed into another prime (144440531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72220260 + 72220261.

It is an arithmetic number, because the mean of its divisors is an integer number (72220261).

Almost surely, 2^144440521 is an apocalyptic number.

It is an amenable number.

144440521 is a deficient number, since it is larger than the sum of its proper divisors (1).

144440521 is an equidigital number, since it uses as much as digits as its factorization.

144440521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2560, while the sum is 25.

The square root of 144440521 is about 12018.3410252830. The cubic root of 144440521 is about 524.6822215978.

Adding to 144440521 its reverse (125044441), we get a palindrome (269484962).

The spelling of 144440521 in words is "one hundred forty-four million, four hundred forty thousand, five hundred twenty-one".