2544540 has 24 divisors (see below), whose sum is σ = 7124880. Its totient is φ = 678528.

The previous prime is 2544539. The next prime is 2544571. The reversal of 2544540 is 454452.

It is a self number, because there is not a number n which added to its sum of digits gives 2544540.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21145 + ... + 21264.

It is an arithmetic number, because the mean of its divisors is an integer number (296870).

2^2544540 is an apocalyptic number.

2544540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2544540 is an abundant number, since it is smaller than the sum of its proper divisors (4580340).

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

2544540 is a wasteful number, since it uses less digits than its factorization.

2544540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42421 (or 42419 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 24.

The square root of 2544540 is about 1595.1614338367. The cubic root of 2544540 is about 136.5221421500.

Adding to 2544540 its reverse (454452), we get a palindrome (2998992).

The spelling of 2544540 in words is "two million, five hundred forty-four thousand, five hundred forty".