166241 has 4 divisors (see below), whose sum is σ = 170772. Its totient is φ = 161712.

The previous prime is 166237. The next prime is 166247. The reversal of 166241 is 142661.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 142661 = 331 ⋅431.

It can be written as a sum of positive squares in 2 ways, for example, as 160000 + 6241 = 400^2 + 79^2 .

It is a cyclic number.

It is not a de Polignac number, because 166241 - 2² = 166237 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 166241.

It is not an unprimeable number, because it can be changed into a prime (166247) 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 3 ways as a sum of consecutive naturals, for example, 2210 + ... + 2283.

It is an arithmetic number, because the mean of its divisors is an integer number (42693).

2¹⁶⁶²⁴¹ is an apocalyptic number.

It is an amenable number.

166241 is a deficient number, since it is larger than the sum of its proper divisors (4531).

166241 is an equidigital number, since it uses as much as digits as its factorization.

166241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4530.

The product of its digits is 288, while the sum is 20.

The square root of 166241 is about 407.7266241000. The cubic root of 166241 is about 54.9852301938.

It can be divided in two parts, 16 and 6241, that multiplied together give a square (99856 = 316²).

The spelling of 166241 in words is "one hundred sixty-six thousand, two hundred forty-one".