268161 has 4 divisors (see below), whose sum is σ = 357552. Its totient is φ = 178772.

The previous prime is 268153. The next prime is 268171. The reversal of 268161 is 161862.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 268161 - 2³ = 268153 is a prime.

It is a D-number.

It is a Curzon number.

268161 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (268171) 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, 44691 + ... + 44696.

It is an arithmetic number, because the mean of its divisors is an integer number (89388).

2²⁶⁸¹⁶¹ is an apocalyptic number.

It is an amenable number.

268161 is a deficient number, since it is larger than the sum of its proper divisors (89391).

268161 is an equidigital number, since it uses as much as digits as its factorization.

268161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89390.

The product of its digits is 576, while the sum is 24.

The square root of 268161 is about 517.8426401910. The cubic root of 268161 is about 64.4859653377.

The spelling of 268161 in words is "two hundred sixty-eight thousand, one hundred sixty-one".