2161546 has 4 divisors (see below), whose sum is σ = 3242322. Its totient is φ = 1080772.

The previous prime is 2161513. The next prime is 2161553. The reversal of 2161546 is 6451612.

2161546 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2117025 + 44521 = 1455^2 + 211^2 .

It is a super-3 number, since 3×2161546³ = 30298051633340398008, which contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 2161546.

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 as a sum of consecutive naturals, namely, 540385 + ... + 540388.

2^2161546 is an apocalyptic number.

2161546 is a deficient number, since it is larger than the sum of its proper divisors (1080776).

2161546 is a wasteful number, since it uses less digits than its factorization.

2161546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1080775.

The product of its digits is 1440, while the sum is 25.

The square root of 2161546 is about 1470.2197114717. The cubic root of 2161546 is about 129.2969143806.

The spelling of 2161546 in words is "two million, one hundred sixty-one thousand, five hundred forty-six".