2561984 has 14 divisors (see below), whose sum is σ = 5084064. Its totient is φ = 1280960.

The previous prime is 2561981. The next prime is 2561987. The reversal of 2561984 is 4891652.

It is an interprime number because it is at equal distance from previous prime (2561981) and next prime (2561987).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2561981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19952 + ... + 20079.

2^2561984 is an apocalyptic number.

It is an amenable number.

2561984 is a deficient number, since it is larger than the sum of its proper divisors (2522080).

2561984 is an equidigital number, since it uses as much as digits as its factorization.

2561984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40043 (or 40033 counting only the distinct ones).

The product of its digits is 17280, while the sum is 35.

The square root of 2561984 is about 1600.6198799215. The cubic root of 2561984 is about 136.8334061116.

The spelling of 2561984 in words is "two million, five hundred sixty-one thousand, nine hundred eighty-four".