8521140 has 24 divisors (see below), whose sum is σ = 23859360. Its totient is φ = 2272288.

The previous prime is 8521133. The next prime is 8521141. The reversal of 8521140 is 411258.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8521141) 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, 70950 + ... + 71069.

It is an arithmetic number, because the mean of its divisors is an integer number (994140).

Almost surely, 2^8521140 is an apocalyptic number.

It is an amenable number.

8521140 is an abundant number, since it is smaller than the sum of its proper divisors (15338220).

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

8521140 is a wasteful number, since it uses less digits than its factorization.

8521140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142031 (or 142029 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 8521140 is about 2919.0991761158. The cubic root of 8521140 is about 204.2518036343.

Adding to 8521140 its reverse (411258), we get a palindrome (8932398).

The spelling of 8521140 in words is "eight million, five hundred twenty-one thousand, one hundred forty".