2161892 has 12 divisors (see below), whose sum is σ = 3913980. Its totient is φ = 1043616.

The previous prime is 2161883. The next prime is 2161897. The reversal of 2161892 is 2981612.

2161892 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 376996 + 1784896 = 614^2 + 1336^2 .

It is a Harshad number since it is a multiple of its sum of digits (29).

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (2161897) 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 3 ways as a sum of consecutive naturals, for example, 9203 + ... + 9434.

It is an arithmetic number, because the mean of its divisors is an integer number (326165).

2^2161892 is an apocalyptic number.

It is an amenable number.

2161892 is a deficient number, since it is larger than the sum of its proper divisors (1752088).

2161892 is a wasteful number, since it uses less digits than its factorization.

2161892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18670 (or 18668 counting only the distinct ones).

The product of its digits is 1728, while the sum is 29.

The square root of 2161892 is about 1470.3373762508. The cubic root of 2161892 is about 129.3038128914.

The spelling of 2161892 in words is "two million, one hundred sixty-one thousand, eight hundred ninety-two".