2555605 has 8 divisors (see below), whose sum is σ = 3302712. Its totient is φ = 1887168.

The previous prime is 2555591. The next prime is 2555617. The reversal of 2555605 is 5065552.

It can be written as a sum of positive squares in 4 ways, for example, as 239121 + 2316484 = 489^2 + 1522^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2555605 - 2⁷ = 2555477 is a prime.

It is a super-2 number, since 2×2555605² = 13062233832050, which contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 19594 + ... + 19723.

It is an arithmetic number, because the mean of its divisors is an integer number (412839).

2^2555605 is an apocalyptic number.

It is an amenable number.

2555605 is a deficient number, since it is larger than the sum of its proper divisors (747107).

2555605 is a wasteful number, since it uses less digits than its factorization.

2555605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39335.

The product of its (nonzero) digits is 7500, while the sum is 28.

The square root of 2555605 is about 1598.6259725151. The cubic root of 2555605 is about 136.7197460553.

It can be divided in two parts, 2555 and 605, that added together give a triangular number (3160 = T₇₉).

The spelling of 2555605 in words is "two million, five hundred fifty-five thousand, six hundred five".