• 162 can be written using four 4's:
162 has 10 divisors (see below), whose sum is σ = 363. Its totient is φ = 54.
The previous prime is 157. The next prime is 163. The reversal of 162 is 261.
162 is nontrivially palindromic in base 8.
162 is an esthetic number in base 7, because in such base its adjacent digits differ by 1.
It can be written as a sum of positive squares in only one way, i.e., 81 + 81 = 9^2 + 9^2 .
It is an ABA number since it can be written as A⋅BA, here for A=2, B=9.
It is a Harshad number since it is a multiple of its sum of digits (9).
It is a nude number because it is divisible by every one of its digits.
It is one of the 548 Lynch-Bell numbers.
162 is an undulating number in base 8.
It is a plaindrome in base 5, base 11, base 12 and base 15.
It is a nialpdrome in base 3, base 6, base 7, base 9, base 13, base 14 and base 16.
It is a zygodrome in base 5.
162 is an untouchable number, because it is not equal to the sum of proper divisors of any number.
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 4 ways as a sum of consecutive naturals, for example, 53 + 54 + 55.
It is a practical number, because each smaller number is the sum of distinct divisors of 162
162 is an abundant number, since it is smaller than the sum of its proper divisors (201).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
162 is an equidigital number, since it uses as much as digits as its factorization.
162 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 14 (or 5 counting only the distinct ones).
The product of its digits is 12, while the sum is 9.
The square root of 162 is about 12.7279220614. The cubic root of 162 is about 5.4513617785.
Subtracting 162 from its reverse (261), we obtain a palindrome (99).
It can be divided in two parts, 16 and 2, that multiplied together give a 5-th power (32 = 25).
The spelling of 162 in words is "one hundred sixty-two", and thus it is an aban number.
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