8421136 has 20 divisors (see below), whose sum is σ = 16879500. Its totient is φ = 4065152.

The previous prime is 8421079. The next prime is 8421143. The reversal of 8421136 is 6311248.

It can be written as a sum of positive squares in 2 ways, for example, as 3385600 + 5035536 = 1840^2 + 2244^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 8421136.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8611 + ... + 9538.

It is an arithmetic number, because the mean of its divisors is an integer number (843975).

Almost surely, 2^8421136 is an apocalyptic number.

It is an amenable number.

8421136 is an abundant number, since it is smaller than the sum of its proper divisors (8458364).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8421136 is a wasteful number, since it uses less digits than its factorization.

8421136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18186 (or 18180 counting only the distinct ones).

The product of its digits is 1152, while the sum is 25.

The square root of 8421136 is about 2901.9193648342. The cubic root of 8421136 is about 203.4496250176.

The spelling of 8421136 in words is "eight million, four hundred twenty-one thousand, one hundred thirty-six".