2545540 has 12 divisors (see below), whose sum is σ = 5345676. Its totient is φ = 1018208.

The previous prime is 2545523. The next prime is 2545553. The reversal of 2545540 is 455452.

2545540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 1557504 + 988036 = 1248^2 + 994^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63619 + ... + 63658.

It is an arithmetic number, because the mean of its divisors is an integer number (445473).

2^2545540 is an apocalyptic number.

2545540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2545540 is an abundant number, since it is smaller than the sum of its proper divisors (2800136).

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

2545540 is a wasteful number, since it uses less digits than its factorization.

2545540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127286 (or 127284 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 25.

The square root of 2545540 is about 1595.4748509456. The cubic root of 2545540 is about 136.5400241328.

The spelling of 2545540 in words is "two million, five hundred forty-five thousand, five hundred forty".