2561774 has 4 divisors (see below), whose sum is σ = 3842664. Its totient is φ = 1280886.

The previous prime is 2561771. The next prime is 2561807. The reversal of 2561774 is 4771652.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 2561774.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2561771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 640442 + ... + 640445.

It is an arithmetic number, because the mean of its divisors is an integer number (960666).

2^2561774 is an apocalyptic number.

2561774 is a deficient number, since it is larger than the sum of its proper divisors (1280890).

2561774 is a wasteful number, since it uses less digits than its factorization.

2561774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1280889.

The product of its digits is 11760, while the sum is 32.

The square root of 2561774 is about 1600.5542789921. The cubic root of 2561774 is about 136.8296673684.

The spelling of 2561774 in words is "two million, five hundred sixty-one thousand, seven hundred seventy-four".