2165741 has 2 divisors, whose sum is σ = 2165742. Its totient is φ = 2165740.

The previous prime is 2165711. The next prime is 2165747. The reversal of 2165741 is 1475612.

2165741 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1811716 + 354025 = 1346^2 + 595^2 .

It is a cyclic number.

It is not a de Polignac number, because 2165741 - 2¹⁸ = 1903597 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2165741.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2165747) 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, 1082870 + 1082871.

It is an arithmetic number, because the mean of its divisors is an integer number (1082871).

2^2165741 is an apocalyptic number.

It is an amenable number.

2165741 is a deficient number, since it is larger than the sum of its proper divisors (1).

2165741 is an equidigital number, since it uses as much as digits as its factorization.

2165741 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1680, while the sum is 26.

The square root of 2165741 is about 1471.6456774645. The cubic root of 2165741 is about 129.3805042506.

The spelling of 2165741 in words is "two million, one hundred sixty-five thousand, seven hundred forty-one".