1445128558225 has 45 divisors (see below), whose sum is σ = 1972135633035. Its totient is φ = 1050473648400.

The previous prime is 1445128558183. The next prime is 1445128558229. The reversal of 1445128558225 is 5228558215441.

The square root of 1445128558225 is 1202135.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 520246280961 + 924882277264 = 721281^2 + 961708^2 .

It is not a de Polignac number, because 1445128558225 - 2¹¹ = 1445128556177 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1445128558229) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 727290682 + ... + 727292668.

Almost surely, 2^{1445128558225} is an apocalyptic number.

1445128558225 is the 1202135-th square number.

1445128558225 is the 601068-th centered octagonal number.

It is an amenable number.

1445128558225 is a deficient number, since it is larger than the sum of its proper divisors (527007074810).

1445128558225 is an frugal number, since it uses more digits than its factorization.

1445128558225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4028 (or 2003 counting only the distinct ones).

The product of its digits is 5120000, while the sum is 52.

The spelling of 1445128558225 in words is "one trillion, four hundred forty-five billion, one hundred twenty-eight million, five hundred fifty-eight thousand, two hundred twenty-five".