6540500 has 48 divisors (see below), whose sum is σ = 14536704. Its totient is φ = 2570400.

The previous prime is 6540493. The next prime is 6540511. The reversal of 6540500 is 50456.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51437 + ... + 51563.

It is an arithmetic number, because the mean of its divisors is an integer number (302848).

Almost surely, 2^6540500 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6540500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7268352).

6540500 is an abundant number, since it is smaller than the sum of its proper divisors (7996204).

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

6540500 is a wasteful number, since it uses less digits than its factorization.

6540500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249 (or 237 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 6540500 is about 2557.4401263764. The cubic root of 6540500 is about 187.0123625140.

Adding to 6540500 its reverse (50456), we get a palindrome (6590956).

The spelling of 6540500 in words is "six million, five hundred forty thousand, five hundred".