2109345 has 16 divisors (see below), whose sum is σ = 3857280. Its totient is φ = 964224.

The previous prime is 2109329. The next prime is 2109391. The reversal of 2109345 is 5439012.

It is not a de Polignac number, because 2109345 - 2⁴ = 2109329 is a prime.

2109345 is a lucky number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9940 + ... + 10149.

It is an arithmetic number, because the mean of its divisors is an integer number (241080).

2^2109345 is an apocalyptic number.

It is an amenable number.

2109345 is a deficient number, since it is larger than the sum of its proper divisors (1747935).

2109345 is a wasteful number, since it uses less digits than its factorization.

2109345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20104.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 2109345 is about 1452.3584268355. The cubic root of 2109345 is about 128.2475880064.

The spelling of 2109345 in words is "two million, one hundred nine thousand, three hundred forty-five".