2561704 has 8 divisors (see below), whose sum is σ = 4803210. Its totient is φ = 1280848.

The previous prime is 2561683. The next prime is 2561723. The reversal of 2561704 is 4071652.

It can be written as a sum of positive squares in only one way, i.e., 2553604 + 8100 = 1598^2 + 90^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160099 + ... + 160114.

2^2561704 is an apocalyptic number.

It is an amenable number.

2561704 is a deficient number, since it is larger than the sum of its proper divisors (2241506).

2561704 is a wasteful number, since it uses less digits than its factorization.

2561704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320219 (or 320215 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 2561704 is about 1600.5324114182. The cubic root of 2561704 is about 136.8284210753.

The spelling of 2561704 in words is "two million, five hundred sixty-one thousand, seven hundred four".