2640555 has 12 divisors (see below), whose sum is σ = 4577040. Its totient is φ = 1408272.

The previous prime is 2640551. The next prime is 2640571. The reversal of 2640555 is 5550462.

It is not a de Polignac number, because 2640555 - 2² = 2640551 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2640551) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29295 + ... + 29384.

It is an arithmetic number, because the mean of its divisors is an integer number (381420).

2^2640555 is an apocalyptic number.

2640555 is a deficient number, since it is larger than the sum of its proper divisors (1936485).

2640555 is a wasteful number, since it uses less digits than its factorization.

2640555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58690 (or 58687 counting only the distinct ones).

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

The square root of 2640555 is about 1624.9784613957. The cubic root of 2640555 is about 138.2181489845.

The spelling of 2640555 in words is "two million, six hundred forty thousand, five hundred fifty-five".