8212540 has 24 divisors (see below), whose sum is σ = 19710432. Its totient is φ = 2815680.

The previous prime is 8212517. The next prime is 8212549. The reversal of 8212540 is 452128.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8212549) 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, 29191 + ... + 29470.

It is an arithmetic number, because the mean of its divisors is an integer number (821268).

Almost surely, 2^8212540 is an apocalyptic number.

It is an amenable number.

8212540 is an abundant number, since it is smaller than the sum of its proper divisors (11497892).

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

8212540 is a wasteful number, since it uses less digits than its factorization.

8212540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58677 (or 58675 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 8212540 is about 2865.7529551586. The cubic root of 8212540 is about 201.7557089963.

Adding to 8212540 its reverse (452128), we get a palindrome (8664668).

The spelling of 8212540 in words is "eight million, two hundred twelve thousand, five hundred forty".