2161004 has 6 divisors (see below), whose sum is σ = 3781764. Its totient is φ = 1080500.

The previous prime is 2161001. The next prime is 2161007. The reversal of 2161004 is 4001612.

2161004 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2161001) and next prime (2161007).

It is a self number, because there is not a number n which added to its sum of digits gives 2161004.

It is not an unprimeable number, because it can be changed into a prime (2161001) 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 as a sum of consecutive naturals, namely, 270122 + ... + 270129.

It is an arithmetic number, because the mean of its divisors is an integer number (630294).

2^2161004 is an apocalyptic number.

It is an amenable number.

2161004 is a deficient number, since it is larger than the sum of its proper divisors (1620760).

2161004 is a wasteful number, since it uses less digits than its factorization.

2161004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540255 (or 540253 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 2161004 is about 1470.0353737240. The cubic root of 2161004 is about 129.2861065628.

Adding to 2161004 its reverse (4001612), we get a palindrome (6162616).

The spelling of 2161004 in words is "two million, one hundred sixty-one thousand, four".