262161 has 6 divisors (see below), whose sum is σ = 378690. Its totient is φ = 174768.

The previous prime is 262153. The next prime is 262187. The reversal of 262161 is 161262.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 197136 + 65025 = 444^2 + 255^2 .

It is not a de Polignac number, because 262161 - 2³ = 262153 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 262161.

It is not an unprimeable number, because it can be changed into a prime (262111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (3) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14556 + ... + 14573.

It is an arithmetic number, because the mean of its divisors is an integer number (63115).

2²⁶²¹⁶¹ is an apocalyptic number.

It is an amenable number.

262161 is a deficient number, since it is larger than the sum of its proper divisors (116529).

262161 is a wasteful number, since it uses less digits than its factorization.

262161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29135 (or 29132 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 262161 is about 512.0166012934. The cubic root of 262161 is about 64.0013834336.

It can be divided in two parts, 26 and 2161, that added together give a 7-th power (2187 = 3⁷).

The spelling of 262161 in words is "two hundred sixty-two thousand, one hundred sixty-one".