2505609 has 12 divisors (see below), whose sum is σ = 3640000. Its totient is φ = 1660824.

The previous prime is 2505557. The next prime is 2505611. The reversal of 2505609 is 9065052.

2505609 is a `hidden beast` number, since 2 + 50 + 5 + 609 = 666.

2505609 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2505609 - 2⁸ = 2505353 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2505109) 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 in 11 ways as a sum of consecutive naturals, for example, 1092 + ... + 2490.

2^2505609 is an apocalyptic number.

It is an amenable number.

2505609 is a deficient number, since it is larger than the sum of its proper divisors (1134391).

2505609 is a wasteful number, since it uses less digits than its factorization.

2505609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1604 (or 1601 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

The square root of 2505609 is about 1582.9115578579. The cubic root of 2505609 is about 135.8223061377.

The spelling of 2505609 in words is "two million, five hundred five thousand, six hundred nine".