8421536 has 24 divisors (see below), whose sum is σ = 16771860. Its totient is φ = 4162048.

The previous prime is 8421529. The next prime is 8421547. The reversal of 8421536 is 6351248.

It can be written as a sum of positive squares in 2 ways, for example, as 7507600 + 913936 = 2740^2 + 956^2 .

It is a junction number, because it is equal to n+sod(n) for n = 8421499 and 8421508.

It is a congruent number.

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, 1370 + ... + 4326.

Almost surely, 2^8421536 is an apocalyptic number.

It is an amenable number.

8421536 is a deficient number, since it is larger than the sum of its proper divisors (8350324).

8421536 is a wasteful number, since it uses less digits than its factorization.

8421536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3056 (or 3048 counting only the distinct ones).

The product of its digits is 5760, while the sum is 29.

The square root of 8421536 is about 2901.9882839185. The cubic root of 8421536 is about 203.4528462204.

The spelling of 8421536 in words is "eight million, four hundred twenty-one thousand, five hundred thirty-six".