1445521266 has 36 divisors (see below), whose sum is σ = 3643305822. Its totient is φ = 413005824.

The previous prime is 1445521249. The next prime is 1445521279. The reversal of 1445521266 is 6621255441.

1445521266 is a `hidden beast` number, since 1 + 44 + 552 + 1 + 2 + 66 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1430428041 + 15093225 = 37821^2 + 3885^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1445521266.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 818575 + ... + 820338.

Almost surely, 2^1445521266 is an apocalyptic number.

1445521266 is an abundant number, since it is smaller than the sum of its proper divisors (2197784556).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1445521266 is a wasteful number, since it uses less digits than its factorization.

1445521266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1638935 (or 1638925 counting only the distinct ones).

The product of its digits is 57600, while the sum is 36.

The square root of 1445521266 is about 38020.0113887411. The cubic root of 1445521266 is about 1130.6846468390.

It can be divided in two parts, 14455 and 21266, that added together give a square (35721 = 189²).

The spelling of 1445521266 in words is "one billion, four hundred forty-five million, five hundred twenty-one thousand, two hundred sixty-six".