2164306 has 4 divisors (see below), whose sum is σ = 3246462. Its totient is φ = 1082152.

The previous prime is 2164291. The next prime is 2164307. The reversal of 2164306 is 6034612.

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., 1798281 + 366025 = 1341^2 + 605^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (2164307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 541075 + ... + 541078.

2^2164306 is an apocalyptic number.

2164306 is a deficient number, since it is larger than the sum of its proper divisors (1082156).

2164306 is a wasteful number, since it uses less digits than its factorization.

2164306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1082155.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 2164306 is about 1471.1580472539. The cubic root of 2164306 is about 129.3519224943.

Adding to 2164306 its reverse (6034612), we get a palindrome (8198918).

The spelling of 2164306 in words is "two million, one hundred sixty-four thousand, three hundred six".