144411521 has 2 divisors, whose sum is σ = 144411522. Its totient is φ = 144411520.

The previous prime is 144411497. The next prime is 144411523. The reversal of 144411521 is 125114441.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79834225 + 64577296 = 8935^2 + 8036^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-144411521 is a prime.

Together with 144411523, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (144411523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72205760 + 72205761.

It is an arithmetic number, because the mean of its divisors is an integer number (72205761).

Almost surely, 2^144411521 is an apocalyptic number.

It is an amenable number.

144411521 is a deficient number, since it is larger than the sum of its proper divisors (1).

144411521 is an equidigital number, since it uses as much as digits as its factorization.

144411521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 640, while the sum is 23.

The square root of 144411521 is about 12017.1344754064. The cubic root of 144411521 is about 524.6471049451.

Adding to 144411521 its reverse (125114441), we get a palindrome (269525962).

The spelling of 144411521 in words is "one hundred forty-four million, four hundred eleven thousand, five hundred twenty-one".