2745891 has 24 divisors (see below), whose sum is σ = 4262544. Its totient is φ = 1697280.

The previous prime is 2745863. The next prime is 2745907. The reversal of 2745891 is 1985472.

2745891 is a `hidden beast` number, since 2 + 74 + 589 + 1 = 666.

2745891 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 2745891 - 2⁵ = 2745859 is a prime.

Its product of digits (20160) is a multiple of the sum of its prime divisors (288).

It is not an unprimeable number, because it can be changed into a prime (2745091) 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 23 ways as a sum of consecutive naturals, for example, 19975 + ... + 20111.

It is an arithmetic number, because the mean of its divisors is an integer number (177606).

2^2745891 is an apocalyptic number.

2745891 is a deficient number, since it is larger than the sum of its proper divisors (1516653).

2745891 is a wasteful number, since it uses less digits than its factorization.

2745891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291 (or 288 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 2745891 is about 1657.0730219275. The cubic root of 2745891 is about 140.0321524792.

The spelling of 2745891 in words is "two million, seven hundred forty-five thousand, eight hundred ninety-one".