2091005 has 8 divisors (see below), whose sum is σ = 2867712. Its totient is φ = 1433808.

The previous prime is 2090989. The next prime is 2091053. The reversal of 2091005 is 5001902.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2091005 - 2⁴ = 2090989 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29837 + ... + 29906.

It is an arithmetic number, because the mean of its divisors is an integer number (358464).

2^2091005 is an apocalyptic number.

It is an amenable number.

2091005 is a deficient number, since it is larger than the sum of its proper divisors (776707).

2091005 is an equidigital number, since it uses as much as digits as its factorization.

2091005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59755.

The product of its (nonzero) digits is 90, while the sum is 17.

The square root of 2091005 is about 1446.0307742230. The cubic root of 2091005 is about 127.8748165759.

Adding to 2091005 its reverse (5001902), we get a palindrome (7092907).

The spelling of 2091005 in words is "two million, ninety-one thousand, five".