2161449 has 12 divisors (see below), whose sum is σ = 3146676. Its totient is φ = 1429632.

The previous prime is 2161447. The next prime is 2161469. The reversal of 2161449 is 9441612.

2161449 is a `hidden beast` number, since 2 + 1 + 614 + 49 = 666.

2161449 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 535824 + 1625625 = 732^2 + 1275^2 .

It is not a de Polignac number, because 2161449 - 2¹ = 2161447 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2161447) 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 11 ways as a sum of consecutive naturals, for example, 357 + ... + 2109.

It is an arithmetic number, because the mean of its divisors is an integer number (262223).

2^2161449 is an apocalyptic number.

It is an amenable number.

2161449 is a deficient number, since it is larger than the sum of its proper divisors (985227).

2161449 is a wasteful number, since it uses less digits than its factorization.

2161449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1896 (or 1893 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 2161449 is about 1470.1867228349. The cubic root of 2161449 is about 129.2949802729.

It can be divided in two parts, 216144 and 9, that added together give a triangular number (216153 = T₆₅₇).

The spelling of 2161449 in words is "two million, one hundred sixty-one thousand, four hundred forty-nine".