2091845 has 16 divisors (see below), whose sum is σ = 2920320. Its totient is φ = 1408704.

The previous prime is 2091839. The next prime is 2091847. The reversal of 2091845 is 5481902.

It is a cyclic number.

It is not a de Polignac number, because 2091845 - 2¹⁰ = 2090821 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2091847) 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, 1559 + ... + 2571.

It is an arithmetic number, because the mean of its divisors is an integer number (182520).

2^2091845 is an apocalyptic number.

It is an amenable number.

2091845 is a deficient number, since it is larger than the sum of its proper divisors (828475).

2091845 is a wasteful number, since it uses less digits than its factorization.

2091845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1084.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 2091845 is about 1446.3211953090. The cubic root of 2091845 is about 127.8919376039.

The spelling of 2091845 in words is "two million, ninety-one thousand, eight hundred forty-five".