8427569121 has 12 divisors (see below), whose sum is σ = 12199567380. Its totient is φ = 5606189280.

The previous prime is 8427569093. The next prime is 8427569141. The reversal of 8427569121 is 1219657248.

8427569121 is a `hidden beast` number, since 84 + 2 + 7 + 569 + 1 + 2 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 3541559121 + 4886010000 = 59511^2 + 69900^2 .

It is not a de Polignac number, because 8427569121 - 2⁵ = 8427569089 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8427569141) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1011466 + ... + 1019763.

It is an arithmetic number, because the mean of its divisors is an integer number (1016630615).

Almost surely, 2^8427569121 is an apocalyptic number.

It is an amenable number.

8427569121 is a deficient number, since it is larger than the sum of its proper divisors (3771998259).

8427569121 is a wasteful number, since it uses less digits than its factorization.

8427569121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2031696 (or 2031693 counting only the distinct ones).

The product of its digits is 241920, while the sum is 45.

The square root of 8427569121 is about 91801.7925805373. The cubic root of 8427569121 is about 2035.0141862027.

The spelling of 8427569121 in words is "eight billion, four hundred twenty-seven million, five hundred sixty-nine thousand, one hundred twenty-one".