163261 has 8 divisors (see below), whose sum is σ = 189504. Its totient is φ = 137760.

The previous prime is 163259. The next prime is 163307. The reversal of 163261 is 162361.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 163261 - 2¹ = 163259 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 441 + ... + 721.

It is an arithmetic number, because the mean of its divisors is an integer number (23688).

2¹⁶³²⁶¹ is an apocalyptic number.

It is an amenable number.

163261 is a deficient number, since it is larger than the sum of its proper divisors (26243).

163261 is an equidigital number, since it uses as much as digits as its factorization.

163261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 371.

The product of its digits is 216, while the sum is 19.

The square root of 163261 is about 404.0556892311. The cubic root of 163261 is about 54.6546961363.

Subtracting from 163261 its reverse (162361), we obtain a square (900 = 30²).

It can be divided in two parts, 163 and 261, that added together give a palindrome (424).

The spelling of 163261 in words is "one hundred sixty-three thousand, two hundred sixty-one".