2165249 has 2 divisors, whose sum is σ = 2165250. Its totient is φ = 2165248.

The previous prime is 2165237. The next prime is 2165291. The reversal of 2165249 is 9425612.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1364224 + 801025 = 1168^2 + 895^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2165249 is a prime.

It is not a weakly prime, because it can be changed into another prime (2162249) by changing a digit.

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 as a sum of consecutive naturals, namely, 1082624 + 1082625.

It is an arithmetic number, because the mean of its divisors is an integer number (1082625).

2^2165249 is an apocalyptic number.

It is an amenable number.

2165249 is a deficient number, since it is larger than the sum of its proper divisors (1).

2165249 is an equidigital number, since it uses as much as digits as its factorization.

2165249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4320, while the sum is 29.

The square root of 2165249 is about 1471.4785081679. The cubic root of 2165249 is about 129.3707062139.

The spelling of 2165249 in words is "two million, one hundred sixty-five thousand, two hundred forty-nine".