2749845 has 16 divisors (see below), whose sum is σ = 5028480. Its totient is φ = 1257024.

The previous prime is 2749823. The next prime is 2749847. The reversal of 2749845 is 5489472.

It is not a de Polignac number, because 2749845 - 2⁷ = 2749717 is a prime.

2749845 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2749847) 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 15 ways as a sum of consecutive naturals, for example, 12990 + ... + 13199.

It is an arithmetic number, because the mean of its divisors is an integer number (314280).

2^2749845 is an apocalyptic number.

It is an amenable number.

2749845 is a deficient number, since it is larger than the sum of its proper divisors (2278635).

2749845 is a wasteful number, since it uses less digits than its factorization.

2749845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26204.

The product of its digits is 80640, while the sum is 39.

The square root of 2749845 is about 1658.2656602607. The cubic root of 2749845 is about 140.0993342645.

Subtracting from 2749845 its product of digits (80640), we obtain a triangular number (2669205 = T₂₃₁₀).

The spelling of 2749845 in words is "two million, seven hundred forty-nine thousand, eight hundred forty-five".