6540212 has 24 divisors (see below), whose sum is σ = 13169856. Its totient is φ = 2783808.

The previous prime is 6540187. The next prime is 6540217. The reversal of 6540212 is 2120456.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6540217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3848 + ... + 5280.

It is an arithmetic number, because the mean of its divisors is an integer number (548744).

Almost surely, 2^6540212 is an apocalyptic number.

It is an amenable number.

6540212 is an abundant number, since it is smaller than the sum of its proper divisors (6629644).

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

6540212 is a wasteful number, since it uses less digits than its factorization.

6540212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1607 (or 1605 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 6540212 is about 2557.3838194530. The cubic root of 6540212 is about 187.0096175480.

Adding to 6540212 its reverse (2120456), we get a palindrome (8660668).

The spelling of 6540212 in words is "six million, five hundred forty thousand, two hundred twelve".