2578091 has 8 divisors (see below), whose sum is σ = 2772480. Its totient is φ = 2389608.

The previous prime is 2578087. The next prime is 2578099. The reversal of 2578091 is 1908752.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2578091 - 2² = 2578087 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2578099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 551 + ... + 2336.

It is an arithmetic number, because the mean of its divisors is an integer number (346560).

2^2578091 is an apocalyptic number.

2578091 is a deficient number, since it is larger than the sum of its proper divisors (194389).

2578091 is a wasteful number, since it uses less digits than its factorization.

2578091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2953.

The product of its (nonzero) digits is 5040, while the sum is 32.

The square root of 2578091 is about 1605.6434847126. The cubic root of 2578091 is about 137.1195610335.

The spelling of 2578091 in words is "two million, five hundred seventy-eight thousand, ninety-one".