2561118 has 48 divisors (see below), whose sum is σ = 6248064. Its totient is φ = 685440.

The previous prime is 2561099. The next prime is 2561129. The reversal of 2561118 is 8111652.

2561118 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (24) coincides with the sum of the digits of its distinct prime factors.

Its product of digits (480) is a multiple of the sum of its prime divisors (240).

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 12033 + ... + 12243.

It is an arithmetic number, because the mean of its divisors is an integer number (130168).

2^2561118 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2561118, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3124032).

2561118 is an abundant number, since it is smaller than the sum of its proper divisors (3686946).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2561118 is a wasteful number, since it uses less digits than its factorization.

2561118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257 (or 240 counting only the distinct ones).

The product of its digits is 480, while the sum is 24.

The square root of 2561118 is about 1600.3493368637. The cubic root of 2561118 is about 136.8179869308.

The spelling of 2561118 in words is "two million, five hundred sixty-one thousand, one hundred eighteen".