2581078 has 4 divisors (see below), whose sum is σ = 3871620. Its totient is φ = 1290538.

The previous prime is 2581069. The next prime is 2581079. The reversal of 2581078 is 8701852.

2581078 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2581079) by changing a digit.

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 as a sum of consecutive naturals, namely, 645268 + ... + 645271.

It is an arithmetic number, because the mean of its divisors is an integer number (967905).

2^2581078 is an apocalyptic number.

2581078 is a deficient number, since it is larger than the sum of its proper divisors (1290542).

2581078 is a wasteful number, since it uses less digits than its factorization.

2581078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1290541.

The product of its (nonzero) digits is 4480, while the sum is 31.

The square root of 2581078 is about 1606.5733721184. The cubic root of 2581078 is about 137.1724965907.

The spelling of 2581078 in words is "two million, five hundred eighty-one thousand, seventy-eight".