2540845 has 8 divisors (see below), whose sum is σ = 3065976. Its totient is φ = 2021376.

The previous prime is 2540831. The next prime is 2540849. The reversal of 2540845 is 5480452.

2540845 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 4 ways, for example, as 9 + 2540836 = 3^2 + 1594^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2540845 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2540849) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 352 + ... + 2281.

It is an arithmetic number, because the mean of its divisors is an integer number (383247).

2^2540845 is an apocalyptic number.

It is an amenable number.

2540845 is a deficient number, since it is larger than the sum of its proper divisors (525131).

2540845 is a wasteful number, since it uses less digits than its factorization.

2540845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2831.

The product of its (nonzero) digits is 6400, while the sum is 28.

The square root of 2540845 is about 1594.0028230841. The cubic root of 2540845 is about 136.4560275559.

The spelling of 2540845 in words is "two million, five hundred forty thousand, eight hundred forty-five".