8521941265 has 4 divisors (see below), whose sum is σ = 10226329524. Its totient is φ = 6817553008.

The previous prime is 8521941229. The next prime is 8521941293. The reversal of 8521941265 is 5621491258.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6499100689 + 2022840576 = 80617^2 + 44976^2 .

It is a cyclic number.

It is not a de Polignac number, because 8521941265 - 2¹⁵ = 8521908497 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 852194122 + ... + 852194131.

It is an arithmetic number, because the mean of its divisors is an integer number (2556582381).

Almost surely, 2^8521941265 is an apocalyptic number.

It is an amenable number.

8521941265 is a deficient number, since it is larger than the sum of its proper divisors (1704388259).

8521941265 is a wasteful number, since it uses less digits than its factorization.

8521941265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1704388258.

The product of its digits is 172800, while the sum is 43.

The square root of 8521941265 is about 92314.3610983687. The cubic root of 8521941265 is about 2042.5820554340.

The spelling of 8521941265 in words is "eight billion, five hundred twenty-one million, nine hundred forty-one thousand, two hundred sixty-five".