2505556 has 6 divisors (see below), whose sum is σ = 4384730. Its totient is φ = 1252776.

The previous prime is 2505541. The next prime is 2505557. The reversal of 2505556 is 6555052.

2505556 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 2371600 + 133956 = 1540^2 + 366^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2505557) by changing a digit.

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, 313191 + ... + 313198.

2^2505556 is an apocalyptic number.

It is an amenable number.

2505556 is a deficient number, since it is larger than the sum of its proper divisors (1879174).

2505556 is a wasteful number, since it uses less digits than its factorization.

2505556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 626393 (or 626391 counting only the distinct ones).

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

The square root of 2505556 is about 1582.8948164676. The cubic root of 2505556 is about 135.8213484686.

The spelling of 2505556 in words is "two million, five hundred five thousand, five hundred fifty-six".