2812645 has 12 divisors (see below), whose sum is σ = 3710700. Its totient is φ = 2045120.

The previous prime is 2812643. The next prime is 2812651. The reversal of 2812645 is 5462182.

It can be written as a sum of positive squares in 2 ways, for example, as 2076481 + 736164 = 1441^2 + 858^2 .

It is not a de Polignac number, because 2812645 - 2¹ = 2812643 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2812643) 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 11 ways as a sum of consecutive naturals, for example, 1720 + ... + 2929.

It is an arithmetic number, because the mean of its divisors is an integer number (309225).

2^2812645 is an apocalyptic number.

It is an amenable number.

2812645 is a deficient number, since it is larger than the sum of its proper divisors (898055).

2812645 is a wasteful number, since it uses less digits than its factorization.

2812645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4676 (or 4665 counting only the distinct ones).

The product of its digits is 3840, while the sum is 28.

The square root of 2812645 is about 1677.0942132152. The cubic root of 2812645 is about 141.1578300722.

It can be divided in two parts, 281 and 2645, that added together give a triangular number (2926 = T₇₆).

The spelling of 2812645 in words is "two million, eight hundred twelve thousand, six hundred forty-five".