8521906 has 8 divisors (see below), whose sum is σ = 12869100. Its totient is φ = 4232208.

The previous prime is 8521871. The next prime is 8521907. The reversal of 8521906 is 6091258.

It can be written as a sum of positive squares in 2 ways, for example, as 8357881 + 164025 = 2891^2 + 405^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (8521907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14001 + ... + 14596.

Almost surely, 2^8521906 is an apocalyptic number.

8521906 is a deficient number, since it is larger than the sum of its proper divisors (4347194).

8521906 is a wasteful number, since it uses less digits than its factorization.

8521906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28748.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 8521906 is about 2919.2303780277. The cubic root of 8521906 is about 204.2579237932.

The spelling of 8521906 in words is "eight million, five hundred twenty-one thousand, nine hundred six".