2561116 has 6 divisors (see below), whose sum is σ = 4481960. Its totient is φ = 1280556.

The previous prime is 2561099. The next prime is 2561129. The reversal of 2561116 is 6111652.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320136 + ... + 320143.

2^2561116 is an apocalyptic number.

It is an amenable number.

2561116 is a deficient number, since it is larger than the sum of its proper divisors (1920844).

2561116 is a wasteful number, since it uses less digits than its factorization.

2561116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640283 (or 640281 counting only the distinct ones).

The product of its digits is 360, while the sum is 22.

The square root of 2561116 is about 1600.3487120000. The cubic root of 2561116 is about 136.8179513166.

Adding to 2561116 its reverse (6111652), we get a palindrome (8672768).

The spelling of 2561116 in words is "two million, five hundred sixty-one thousand, one hundred sixteen".