2561078 has 16 divisors (see below), whose sum is σ = 4173120. Its totient is φ = 1171776.

The previous prime is 2561071. The next prime is 2561089. The reversal of 2561078 is 8701652.

It is an alternating number because its digits alternate between even and odd.

It is a self number, because there is not a number n which added to its sum of digits gives 2561078.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2561071) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3203 + ... + 3921.

It is an arithmetic number, because the mean of its divisors is an integer number (260820).

2^2561078 is an apocalyptic number.

2561078 is a deficient number, since it is larger than the sum of its proper divisors (1612042).

2561078 is a wasteful number, since it uses less digits than its factorization.

2561078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 871.

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 2561078 is about 1600.3368395435. The cubic root of 2561078 is about 136.8172746444.

The spelling of 2561078 in words is "two million, five hundred sixty-one thousand, seventy-eight".