165411 has 6 divisors (see below), whose sum is σ = 238940. Its totient is φ = 110268.

The previous prime is 165397. The next prime is 165437. The reversal of 165411 is 114561.

165411 is a `hidden beast` number, since 1 + 654 + 11 = 666.

It is not a de Polignac number, because 165411 - 2⁵ = 165379 is a prime.

It is a Duffinian number.

165411 is a lucky number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 165411.

It is not an unprimeable number, because it can be changed into a prime (165211) 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 in 5 ways as a sum of consecutive naturals, for example, 9181 + ... + 9198.

2¹⁶⁵⁴¹¹ is an apocalyptic number.

165411 is a deficient number, since it is larger than the sum of its proper divisors (73529).

165411 is a wasteful number, since it uses less digits than its factorization.

165411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18385 (or 18382 counting only the distinct ones).

The product of its digits is 120, while the sum is 18.

The square root of 165411 is about 406.7075116100. The cubic root of 165411 is about 54.8935682791.

Adding to 165411 its reverse (114561), we get a palindrome (279972).

It can be divided in two parts, 165 and 411, that added together give a square (576 = 24²).

The spelling of 165411 in words is "one hundred sixty-five thousand, four hundred eleven".