2540655 has 48 divisors (see below), whose sum is σ = 4900896. Its totient is φ = 1209600.

The previous prime is 2540641. The next prime is 2540663. The reversal of 2540655 is 5560452.

2540655 is a `hidden beast` number, since 2 + 5 + 4 + 0 + 655 = 666.

It is not a de Polignac number, because 2540655 - 2⁶ = 2540591 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 25105 + ... + 25205.

It is an arithmetic number, because the mean of its divisors is an integer number (102102).

2^2540655 is an apocalyptic number.

2540655 is a deficient number, since it is larger than the sum of its proper divisors (2360241).

2540655 is a wasteful number, since it uses less digits than its factorization.

2540655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168 (or 165 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 2540655 is about 1593.9432235811. The cubic root of 2540655 is about 136.4526261558.

The spelling of 2540655 in words is "two million, five hundred forty thousand, six hundred fifty-five".