2165764 has 12 divisors (see below), whose sum is σ = 3842524. Its totient is φ = 1067904.

The previous prime is 2165747. The next prime is 2165771. The reversal of 2165764 is 4675612.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1512900 + 652864 = 1230^2 + 808^2 .

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3417 + ... + 4000.

2^2165764 is an apocalyptic number.

It is an amenable number.

2165764 is a deficient number, since it is larger than the sum of its proper divisors (1676760).

2165764 is a wasteful number, since it uses less digits than its factorization.

2165764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7494 (or 7492 counting only the distinct ones).

The product of its digits is 10080, while the sum is 31.

The square root of 2165764 is about 1471.6534918248. The cubic root of 2165764 is about 129.3809622525.

The spelling of 2165764 in words is "two million, one hundred sixty-five thousand, seven hundred sixty-four".