2161329 has 8 divisors (see below), whose sum is σ = 3051360. Its totient is φ = 1356096.

The previous prime is 2161319. The next prime is 2161331. The reversal of 2161329 is 9231612.

2161329 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 2161329 - 2⁵ = 2161297 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2161299 and 2161308.

It is not an unprimeable number, because it can be changed into a prime (2161319) by changing a digit.

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, 21139 + ... + 21240.

It is an arithmetic number, because the mean of its divisors is an integer number (381420).

2^2161329 is an apocalyptic number.

It is an amenable number.

2161329 is a deficient number, since it is larger than the sum of its proper divisors (890031).

2161329 is a wasteful number, since it uses less digits than its factorization.

2161329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42399.

The product of its digits is 648, while the sum is 24.

The square root of 2161329 is about 1470.1459111258. The cubic root of 2161329 is about 129.2925874822.

The spelling of 2161329 in words is "two million, one hundred sixty-one thousand, three hundred twenty-nine".