8521340 has 24 divisors (see below), whose sum is σ = 18234720. Its totient is φ = 3343808.

The previous prime is 8521327. The next prime is 8521343. The reversal of 8521340 is 431258.

It is a super-2 number, since 2×8521340² = 145226470791200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8521343) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2960 + ... + 5079.

It is an arithmetic number, because the mean of its divisors is an integer number (759780).

Almost surely, 2^8521340 is an apocalyptic number.

It is an amenable number.

8521340 is an abundant number, since it is smaller than the sum of its proper divisors (9713380).

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

8521340 is a wasteful number, since it uses less digits than its factorization.

8521340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8101 (or 8099 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 8521340 is about 2919.1334330585. The cubic root of 8521340 is about 204.2534016224.

Adding to 8521340 its reverse (431258), we get a palindrome (8952598).

The spelling of 8521340 in words is "eight million, five hundred twenty-one thousand, three hundred forty".