165741253 has 2 divisors, whose sum is σ = 165741254. Its totient is φ = 165741252.

The previous prime is 165741239. The next prime is 165741263. The reversal of 165741253 is 352147561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 89737729 + 76003524 = 9473^2 + 8718^2 .

It is an emirp because it is prime and its reverse (352147561) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 165741253 - 2⁹ = 165740741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165741203) 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, 82870626 + 82870627.

It is an arithmetic number, because the mean of its divisors is an integer number (82870627).

Almost surely, 2^165741253 is an apocalyptic number.

It is an amenable number.

165741253 is a deficient number, since it is larger than the sum of its proper divisors (1).

165741253 is an equidigital number, since it uses as much as digits as its factorization.

165741253 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25200, while the sum is 34.

The square root of 165741253 is about 12874.0534797709. The cubic root of 165741253 is about 549.3007676188.

The spelling of 165741253 in words is "one hundred sixty-five million, seven hundred forty-one thousand, two hundred fifty-three".