2161242 has 24 divisors (see below), whose sum is σ = 4857216. Its totient is φ = 720252.

The previous prime is 2161213. The next prime is 2161253. The reversal of 2161242 is 2421612.

2161242 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

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 11 ways as a sum of consecutive naturals, for example, 1738 + ... + 2709.

It is an arithmetic number, because the mean of its divisors is an integer number (202384).

2^2161242 is an apocalyptic number.

2161242 is an abundant number, since it is smaller than the sum of its proper divisors (2695974).

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

2161242 is an equidigital number, since it uses as much as digits as its factorization.

2161242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4464 (or 4452 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 2161242 is about 1470.1163219283. The cubic root of 2161242 is about 129.2908526536.

Adding to 2161242 its reverse (2421612), we get a palindrome (4582854).

The spelling of 2161242 in words is "two million, one hundred sixty-one thousand, two hundred forty-two".