2561105 has 8 divisors (see below), whose sum is σ = 3235200. Its totient is φ = 1940976.

The previous prime is 2561099. The next prime is 2561129. The reversal of 2561105 is 5011652.

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 2561105 - 2⁴ = 2561089 is a prime.

It is a Curzon 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, 13385 + ... + 13574.

It is an arithmetic number, because the mean of its divisors is an integer number (404400).

2^2561105 is an apocalyptic number.

It is an amenable number.

2561105 is a deficient number, since it is larger than the sum of its proper divisors (674095).

2561105 is a wasteful number, since it uses less digits than its factorization.

2561105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26983.

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 2561105 is about 1600.3452752453. The cubic root of 2561105 is about 136.8177554385.

Adding to 2561105 its reverse (5011652), we get a palindrome (7572757).

The spelling of 2561105 in words is "two million, five hundred sixty-one thousand, one hundred five".