2161874 has 16 divisors (see below), whose sum is σ = 3810240. Its totient is φ = 906960.

The previous prime is 2161871. The next prime is 2161883. The reversal of 2161874 is 4781612.

2161874 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 (2161871) 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, 3494 + ... + 4065.

It is an arithmetic number, because the mean of its divisors is an integer number (238140).

2^2161874 is an apocalyptic number.

2161874 is a deficient number, since it is larger than the sum of its proper divisors (1648366).

2161874 is a wasteful number, since it uses less digits than its factorization.

2161874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7585.

The product of its digits is 2688, while the sum is 29.

The square root of 2161874 is about 1470.3312551939. The cubic root of 2161874 is about 129.3034540275.

The spelling of 2161874 in words is "two million, one hundred sixty-one thousand, eight hundred seventy-four".