2101995 has 24 divisors (see below), whose sum is σ = 4164576. Its totient is φ = 960768.

The previous prime is 2101961. The next prime is 2102021. The reversal of 2101995 is 5991012.

It is a happy number.

It is not a de Polignac number, because 2101995 - 2⁷ = 2101867 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3022 + ... + 3651.

It is an arithmetic number, because the mean of its divisors is an integer number (173524).

2^2101995 is an apocalyptic number.

2101995 is a deficient number, since it is larger than the sum of its proper divisors (2062581).

2101995 is a wasteful number, since it uses less digits than its factorization.

2101995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6691 (or 6688 counting only the distinct ones).

The product of its (nonzero) digits is 810, while the sum is 27.

The square root of 2101995 is about 1449.8258516112. The cubic root of 2101995 is about 128.0984553377.

The spelling of 2101995 in words is "two million, one hundred one thousand, nine hundred ninety-five".