8121285 has 12 divisors (see below), whose sum is σ = 14076972. Its totient is φ = 4331328.

The previous prime is 8121283. The next prime is 8121293. The reversal of 8121285 is 5821218.

8121285 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 3272481 + 4848804 = 1809^2 + 2202^2 .

It is not a de Polignac number, because 8121285 - 2¹ = 8121283 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8121283) 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, 90192 + ... + 90281.

It is an arithmetic number, because the mean of its divisors is an integer number (1173081).

Almost surely, 2^8121285 is an apocalyptic number.

It is an amenable number.

8121285 is a deficient number, since it is larger than the sum of its proper divisors (5955687).

8121285 is a wasteful number, since it uses less digits than its factorization.

8121285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180484 (or 180481 counting only the distinct ones).

The product of its digits is 1280, while the sum is 27.

The square root of 8121285 is about 2849.7868341334. The cubic root of 8121285 is about 201.0056432662.

The spelling of 8121285 in words is "eight million, one hundred twenty-one thousand, two hundred eighty-five".