2091045 has 64 divisors (see below), whose sum is σ = 4147200. Its totient is φ = 887040.

The previous prime is 2090989. The next prime is 2091053. The reversal of 2091045 is 5401902.

It is not a de Polignac number, because 2091045 - 2¹⁰ = 2090021 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 72091 + ... + 72119.

It is an arithmetic number, because the mean of its divisors is an integer number (64800).

2^2091045 is an apocalyptic number.

It is an amenable number.

2091045 is a deficient number, since it is larger than the sum of its proper divisors (2056155).

2091045 is a wasteful number, since it uses less digits than its factorization.

2091045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 2091045 is about 1446.0446051212. The cubic root of 2091045 is about 127.8756319669.

Adding to 2091045 its reverse (5401902), we get a palindrome (7492947).

The spelling of 2091045 in words is "two million, ninety-one thousand, forty-five".