2555405 has 16 divisors (see below), whose sum is σ = 3319680. Its totient is φ = 1881792.

The previous prime is 2555363. The next prime is 2555429. The reversal of 2555405 is 5045552.

It is a cyclic number.

It is not a de Polignac number, because 2555405 - 2¹⁶ = 2489869 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3152 + ... + 3878.

It is an arithmetic number, because the mean of its divisors is an integer number (207480).

2^2555405 is an apocalyptic number.

It is an amenable number.

2555405 is a deficient number, since it is larger than the sum of its proper divisors (764275).

2555405 is a wasteful number, since it uses less digits than its factorization.

2555405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 788.

The product of its (nonzero) digits is 5000, while the sum is 26.

The square root of 2555405 is about 1598.5634175722. The cubic root of 2555405 is about 136.7161794292.

The spelling of 2555405 in words is "two million, five hundred fifty-five thousand, four hundred five".