162281 has 8 divisors (see below), whose sum is σ = 188160. Its totient is φ = 137088.

The previous prime is 162277. The next prime is 162287. The reversal of 162281 is 182261.

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

It is not a de Polignac number, because 162281 - 2² = 162277 is a prime.

It is a super-2 number, since 2×162281² = 52670245922, which contains 22 as substring.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 162281.

It is not an unprimeable number, because it can be changed into a prime (162287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 560 + ... + 798.

It is an arithmetic number, because the mean of its divisors is an integer number (23520).

2¹⁶²²⁸¹ is an apocalyptic number.

It is an amenable number.

162281 is a deficient number, since it is larger than the sum of its proper divisors (25879).

162281 is an equidigital number, since it uses as much as digits as its factorization.

162281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343.

The product of its digits is 192, while the sum is 20.

The square root of 162281 is about 402.8411597640. The cubic root of 162281 is about 54.5451187690.

Subtracting from 162281 its sum of digits (20), we obtain a palindrome (162261).

The spelling of 162281 in words is "one hundred sixty-two thousand, two hundred eighty-one".