1445144521 has 8 divisors (see below), whose sum is σ = 1453036104. Its totient is φ = 1437267840.

The previous prime is 1445144513. The next prime is 1445144543. The reversal of 1445144521 is 1254415441.

It can be written as a sum of positive squares in 4 ways, for example, as 28676025 + 1416468496 = 5355^2 + 37636^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1445144521 - 2³ = 1445144513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1445144021) 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, 229191 + ... + 235411.

It is an arithmetic number, because the mean of its divisors is an integer number (181629513).

Almost surely, 2^1445144521 is an apocalyptic number.

It is an amenable number.

1445144521 is a deficient number, since it is larger than the sum of its proper divisors (7891583).

1445144521 is an equidigital number, since it uses as much as digits as its factorization.

1445144521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7451.

The product of its digits is 12800, while the sum is 31.

The square root of 1445144521 is about 38015.0565039696. The cubic root of 1445144521 is about 1130.5864085056.

Adding to 1445144521 its reverse (1254415441), we get a palindrome (2699559962).

The spelling of 1445144521 in words is "one billion, four hundred forty-five million, one hundred forty-four thousand, five hundred twenty-one".