2165995 has 16 divisors (see below), whose sum is σ = 2862720. Its totient is φ = 1563264.

The previous prime is 2165971. The next prime is 2166007. The reversal of 2165995 is 5995612.

It is a cyclic number.

It is not a de Polignac number, because 2165995 - 2⁵ = 2165963 is a prime.

It is a zygodrome in base 12.

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, 2701 + ... + 3409.

It is an arithmetic number, because the mean of its divisors is an integer number (178920).

2^2165995 is an apocalyptic number.

2165995 is a deficient number, since it is larger than the sum of its proper divisors (696725).

2165995 is a wasteful number, since it uses less digits than its factorization.

2165995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 774.

The product of its digits is 24300, while the sum is 37.

The square root of 2165995 is about 1471.7319728809. The cubic root of 2165995 is about 129.3855620058.

It can be divided in two parts, 2165 and 995, that added together give a triangular number (3160 = T₇₉).

The spelling of 2165995 in words is "two million, one hundred sixty-five thousand, nine hundred ninety-five".