1445021521 has 8 divisors (see below), whose sum is σ = 1472857344. Its totient is φ = 1417206960.

The previous prime is 1445021453. The next prime is 1445021527. The reversal of 1445021521 is 1251205441.

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 1445021521 - 2¹⁷ = 1444890449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1445021527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 232626 + ... + 238756.

It is an arithmetic number, because the mean of its divisors is an integer number (184107168).

Almost surely, 2^1445021521 is an apocalyptic number.

It is an amenable number.

1445021521 is a deficient number, since it is larger than the sum of its proper divisors (27835823).

1445021521 is an equidigital number, since it uses as much as digits as its factorization.

1445021521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10631.

The product of its (nonzero) digits is 1600, while the sum is 25.

The square root of 1445021521 is about 38013.4386894951. The cubic root of 1445021521 is about 1130.5543318812.

Adding to 1445021521 its reverse (1251205441), we get a palindrome (2696226962).

The spelling of 1445021521 in words is "one billion, four hundred forty-five million, twenty-one thousand, five hundred twenty-one".