2561716 has 24 divisors (see below), whose sum is σ = 4707584. Its totient is φ = 1218240.

The previous prime is 2561683. The next prime is 2561723. The reversal of 2561716 is 6171652.

2561716 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

2561716 is a nontrivial binomial coefficient, being equal to C(2264, 2).

It is a super-3 number, since 3×2561716³ = 50432929658433329088, which contains 333 as substring.

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 7 ways as a sum of consecutive naturals, for example, 8911 + ... + 9193.

2^2561716 is an apocalyptic number.

2561716 is the 2263-rd triangular number and also the 1132-nd hexagonal number.

2561716 is the 755-th centered nonagonal number.

It is an amenable number.

2561716 is a deficient number, since it is larger than the sum of its proper divisors (2145868).

2561716 is a wasteful number, since it uses less digits than its factorization.

2561716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391 (or 389 counting only the distinct ones).

The product of its digits is 2520, while the sum is 28.

The square root of 2561716 is about 1600.5361601663. The cubic root of 2561716 is about 136.8286347272.

The spelling of 2561716 in words is "two million, five hundred sixty-one thousand, seven hundred sixteen".