2081845 has 16 divisors (see below), whose sum is σ = 2673792. Its totient is φ = 1552320.

The previous prime is 2081843. The next prime is 2081851. The reversal of 2081845 is 5481802.

It is not a de Polignac number, because 2081845 - 2¹ = 2081843 is a prime.

It is a Duffinian number.

2081845 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2081843) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4735 + ... + 5155.

It is an arithmetic number, because the mean of its divisors is an integer number (167112).

2^2081845 is an apocalyptic number.

It is an amenable number.

2081845 is a deficient number, since it is larger than the sum of its proper divisors (591947).

2081845 is a wasteful number, since it uses less digits than its factorization.

2081845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 492.

The product of its (nonzero) digits is 2560, while the sum is 28.

The square root of 2081845 is about 1442.8600070693. The cubic root of 2081845 is about 127.6878175169.

It can be divided in two parts, 2081 and 845, that added together give a triangular number (2926 = T₇₆).

The spelling of 2081845 in words is "two million, eighty-one thousand, eight hundred forty-five".