2161065 has 8 divisors (see below), whose sum is σ = 3457728. Its totient is φ = 1152560.

The previous prime is 2161031. The next prime is 2161087. The reversal of 2161065 is 5601612.

It is a happy number.

2161065 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2161065 - 2⁶ = 2161001 is a prime.

It is an Ulam number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72021 + ... + 72050.

It is an arithmetic number, because the mean of its divisors is an integer number (432216).

2^2161065 is an apocalyptic number.

It is an amenable number.

2161065 is a deficient number, since it is larger than the sum of its proper divisors (1296663).

2161065 is a wasteful number, since it uses less digits than its factorization.

2161065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144079.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 2161065 is about 1470.0561213777. The cubic root of 2161065 is about 129.2873230311.

Adding to 2161065 its reverse (5601612), we get a palindrome (7762677).

The spelling of 2161065 in words is "two million, one hundred sixty-one thousand, sixty-five".