2540855 has 4 divisors (see below), whose sum is σ = 3049032. Its totient is φ = 2032680.

The previous prime is 2540849. The next prime is 2540869. The reversal of 2540855 is 5580452.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2540855 - 2¹⁴ = 2524471 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 254081 + ... + 254090.

It is an arithmetic number, because the mean of its divisors is an integer number (762258).

2^2540855 is an apocalyptic number.

2540855 is a deficient number, since it is larger than the sum of its proper divisors (508177).

2540855 is an equidigital number, since it uses as much as digits as its factorization.

2540855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 508176.

The product of its (nonzero) digits is 8000, while the sum is 29.

The square root of 2540855 is about 1594.0059598383. The cubic root of 2540855 is about 136.4562065723.

The spelling of 2540855 in words is "two million, five hundred forty thousand, eight hundred fifty-five".