7127525521 has 4 divisors (see below), whose sum is σ = 7131979044. Its totient is φ = 7123072000.

The previous prime is 7127525497. The next prime is 7127525527. The reversal of 7127525521 is 1255257217.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1255257217 = 1789 ⋅701653.

It can be written as a sum of positive squares in 2 ways, for example, as 5568144400 + 1559381121 = 74620^2 + 39489^2 .

It is a cyclic number.

It is not a de Polignac number, because 7127525521 - 2²¹ = 7125428369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7127525527) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2224360 + ... + 2227561.

It is an arithmetic number, because the mean of its divisors is an integer number (1782994761).

Almost surely, 2^7127525521 is an apocalyptic number.

It is an amenable number.

7127525521 is a deficient number, since it is larger than the sum of its proper divisors (4453523).

7127525521 is a wasteful number, since it uses less digits than its factorization.

7127525521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4453522.

The product of its digits is 49000, while the sum is 37.

The square root of 7127525521 is about 84424.6736505389. The cubic root of 7127525521 is about 1924.4778948142.

The spelling of 7127525521 in words is "seven billion, one hundred twenty-seven million, five hundred twenty-five thousand, five hundred twenty-one".