7540540 has 24 divisors (see below), whose sum is σ = 18097632. Its totient is φ = 2585280.

The previous prime is 7540529. The next prime is 7540541. The reversal of 7540540 is 450457.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7540541) 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, 26791 + ... + 27070.

It is an arithmetic number, because the mean of its divisors is an integer number (754068).

Almost surely, 2^7540540 is an apocalyptic number.

7540540 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

7540540 is an abundant number, since it is smaller than the sum of its proper divisors (10557092).

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

7540540 is a wasteful number, since it uses less digits than its factorization.

7540540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53877 (or 53875 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 25.

The square root of 7540540 is about 2746.0043699892. The cubic root of 7540540 is about 196.0954345739.

Adding to 7540540 its reverse (450457), we get a palindrome (7990997).

The spelling of 7540540 in words is "seven million, five hundred forty thousand, five hundred forty".