2561996 has 6 divisors (see below), whose sum is σ = 4483500. Its totient is φ = 1280996.

The previous prime is 2561987. The next prime is 2562011. The reversal of 2561996 is 6991652.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320246 + ... + 320253.

It is an arithmetic number, because the mean of its divisors is an integer number (747250).

2^2561996 is an apocalyptic number.

It is an amenable number.

2561996 is a deficient number, since it is larger than the sum of its proper divisors (1921504).

2561996 is a wasteful number, since it uses less digits than its factorization.

2561996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640503 (or 640501 counting only the distinct ones).

The product of its digits is 29160, while the sum is 38.

The square root of 2561996 is about 1600.6236284649. The cubic root of 2561996 is about 136.8336197479.

The spelling of 2561996 in words is "two million, five hundred sixty-one thousand, nine hundred ninety-six".