2161361 has 8 divisors (see below), whose sum is σ = 2217600. Its totient is φ = 2106000.

The previous prime is 2161349. The next prime is 2161373. The reversal of 2161361 is 1631612.

2161361 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2161349) and next prime (2161373).

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

It is a cyclic number.

It is not a de Polignac number, because 2161361 - 2⁶ = 2161297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2161301) 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, 8486 + ... + 8736.

It is an arithmetic number, because the mean of its divisors is an integer number (277200).

2^2161361 is an apocalyptic number.

It is an amenable number.

2161361 is a deficient number, since it is larger than the sum of its proper divisors (56239).

2161361 is a wasteful number, since it uses less digits than its factorization.

2161361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439.

The product of its digits is 216, while the sum is 20.

The square root of 2161361 is about 1470.1567943590. The cubic root of 2161361 is about 129.2932255684.

Adding to 2161361 its reverse (1631612), we get a palindrome (3792973).

The spelling of 2161361 in words is "two million, one hundred sixty-one thousand, three hundred sixty-one".