2605478 has 4 divisors (see below), whose sum is σ = 3908220. Its totient is φ = 1302738.

The previous prime is 2605439. The next prime is 2605481. The reversal of 2605478 is 8745062.

2605478 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8745062 = 2 ⋅4372531.

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 (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 651368 + ... + 651371.

It is an arithmetic number, because the mean of its divisors is an integer number (977055).

2^2605478 is an apocalyptic number.

2605478 is a deficient number, since it is larger than the sum of its proper divisors (1302742).

2605478 is a wasteful number, since it uses less digits than its factorization.

2605478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1302741.

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 2605478 is about 1614.1493115570. The cubic root of 2605478 is about 137.6033911076.

The spelling of 2605478 in words is "two million, six hundred five thousand, four hundred seventy-eight".