2165826 has 16 divisors (see below), whose sum is σ = 4665024. Its totient is φ = 666384.

The previous prime is 2165819. The next prime is 2165843. The reversal of 2165826 is 6285612.

It is a d-powerful number, because it can be written as 2¹⁵ + 1 + 6 + 5⁵ + 8⁵ + 2²¹ + 6 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2165793 and 2165802.

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, 13806 + ... + 13961.

It is an arithmetic number, because the mean of its divisors is an integer number (291564).

2^2165826 is an apocalyptic number.

2165826 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

2165826 is an abundant number, since it is smaller than the sum of its proper divisors (2499198).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2165826 is a wasteful number, since it uses less digits than its factorization.

2165826 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27785.

The product of its digits is 5760, while the sum is 30.

The square root of 2165826 is about 1471.6745564152. The cubic root of 2165826 is about 129.3821968505.

The spelling of 2165826 in words is "two million, one hundred sixty-five thousand, eight hundred twenty-six".