6523540 has 24 divisors (see below), whose sum is σ = 13749120. Its totient is φ = 2599968.

The previous prime is 6523511. The next prime is 6523549. The reversal of 6523540 is 453256.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6523549) 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, 8409 + ... + 9151.

It is an arithmetic number, because the mean of its divisors is an integer number (572880).

Almost surely, 2^6523540 is an apocalyptic number.

It is an amenable number.

6523540 is an abundant number, since it is smaller than the sum of its proper divisors (7225580).

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

6523540 is a wasteful number, since it uses less digits than its factorization.

6523540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1191 (or 1189 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 6523540 is about 2554.1221583942. The cubic root of 6523540 is about 186.8505769658.

Adding to 6523540 its reverse (453256), we get a palindrome (6976796).

The spelling of 6523540 in words is "six million, five hundred twenty-three thousand, five hundred forty".