2109965 has 24 divisors (see below), whose sum is σ = 3004128. Its totient is φ = 1410240.

The previous prime is 2109959. The next prime is 2109973. The reversal of 2109965 is 5699012.

It is not a de Polignac number, because 2109965 - 2⁴ = 2109949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9182 + ... + 9408.

It is an arithmetic number, because the mean of its divisors is an integer number (125172).

2^2109965 is an apocalyptic number.

It is an amenable number.

2109965 is a deficient number, since it is larger than the sum of its proper divisors (894163).

2109965 is a wasteful number, since it uses less digits than its factorization.

2109965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269 (or 256 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 32.

The square root of 2109965 is about 1452.5718570866. The cubic root of 2109965 is about 128.2601520512.

The spelling of 2109965 in words is "two million, one hundred nine thousand, nine hundred sixty-five".