2540815 has 8 divisors (see below), whose sum is σ = 3057840. Its totient is φ = 2026752.

The previous prime is 2540789. The next prime is 2540821. The reversal of 2540815 is 5180452.

2540815 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 2540815 - 2⁷ = 2540687 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2540815.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 2271 + ... + 3199.

It is an arithmetic number, because the mean of its divisors is an integer number (382230).

2^2540815 is an apocalyptic number.

2540815 is a deficient number, since it is larger than the sum of its proper divisors (517025).

2540815 is an equidigital number, since it uses as much as digits as its factorization.

2540815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1481.

The product of its (nonzero) digits is 1600, while the sum is 25.

The square root of 2540815 is about 1593.9934127844. The cubic root of 2540815 is about 136.4554905040.

The spelling of 2540815 in words is "two million, five hundred forty thousand, eight hundred fifteen".