2561607 has 6 divisors (see below), whose sum is σ = 3700112. Its totient is φ = 1707732.

The previous prime is 2561593. The next prime is 2561627. The reversal of 2561607 is 7061652.

2561607 is a `hidden beast` number, since 2 + 56 + 1 + 607 = 666.

2561607 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 2561607 - 2¹⁰ = 2560583 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2561627) 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 5 ways as a sum of consecutive naturals, for example, 142303 + ... + 142320.

2^2561607 is an apocalyptic number.

2561607 is a deficient number, since it is larger than the sum of its proper divisors (1138505).

2561607 is a wasteful number, since it uses less digits than its factorization.

2561607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284629 (or 284626 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 2561607 is about 1600.5021087146. The cubic root of 2561607 is about 136.8266940316.

The spelling of 2561607 in words is "two million, five hundred sixty-one thousand, six hundred seven".