1445525521 has 16 divisors (see below), whose sum is σ = 1678216320. Its totient is φ = 1230503680.

The previous prime is 1445525519. The next prime is 1445525527. The reversal of 1445525521 is 1255255441.

It is a cyclic number.

It is not a de Polignac number, because 1445525521 - 2¹ = 1445525519 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1445525527) 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 15 ways as a sum of consecutive naturals, for example, 17220 + ... + 56458.

It is an arithmetic number, because the mean of its divisors is an integer number (104888520).

Almost surely, 2^1445525521 is an apocalyptic number.

1445525521 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1445525521 is a deficient number, since it is larger than the sum of its proper divisors (232690799).

1445525521 is a wasteful number, since it uses less digits than its factorization.

1445525521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39464.

The product of its digits is 40000, while the sum is 34.

The square root of 1445525521 is about 38020.0673460740. The cubic root of 1445525521 is about 1130.6857562562.

The spelling of 1445525521 in words is "one billion, four hundred forty-five million, five hundred twenty-five thousand, five hundred twenty-one".