2578641 has 16 divisors (see below), whose sum is σ = 3804864. Its totient is φ = 1543104.

The previous prime is 2578621. The next prime is 2578643. The reversal of 2578641 is 1468752.

2578641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2578641 - 2¹¹ = 2576593 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2578643) 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 in 15 ways as a sum of consecutive naturals, for example, 550 + ... + 2336.

It is an arithmetic number, because the mean of its divisors is an integer number (237804).

2^2578641 is an apocalyptic number.

It is an amenable number.

2578641 is a deficient number, since it is larger than the sum of its proper divisors (1226223).

2578641 is a wasteful number, since it uses less digits than its factorization.

2578641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1840.

The product of its digits is 13440, while the sum is 33.

The square root of 2578641 is about 1605.8147464761. The cubic root of 2578641 is about 137.1293111931.

The spelling of 2578641 in words is "two million, five hundred seventy-eight thousand, six hundred forty-one".