2555406 has 48 divisors (see below), whose sum is σ = 6705504. Its totient is φ = 686592.

The previous prime is 2555363. The next prime is 2555429. The reversal of 2555406 is 6045552.

2555406 is a `hidden beast` number, since 255 + 5 + 406 = 666.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2555406.

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 23 ways as a sum of consecutive naturals, for example, 1546 + ... + 2738.

It is an arithmetic number, because the mean of its divisors is an integer number (139698).

2^2555406 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2555406, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3352752).

2555406 is an abundant number, since it is smaller than the sum of its proper divisors (4150098).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2555406 is a wasteful number, since it uses less digits than its factorization.

2555406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1225 (or 1222 counting only the distinct ones).

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

The square root of 2555406 is about 1598.5637303530. The cubic root of 2555406 is about 136.7161972628.

The spelling of 2555406 in words is "two million, five hundred fifty-five thousand, four hundred six".