169812 has 36 divisors (see below), whose sum is σ = 442260. Its totient is φ = 54912.

The previous prime is 169789. The next prime is 169817. The reversal of 169812 is 218961.

169812 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 76176 + 93636 = 276^2 + 306^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×169812² = 57672230688, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

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 169812.

It is not an unprimeable number, because it can be changed into a prime (169817) by changing a digit.

169812 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1864 + ... + 1952.

It is an arithmetic number, because the mean of its divisors is an integer number (12285).

2¹⁶⁹⁸¹² is an apocalyptic number.

169812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 169812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (221130).

169812 is an abundant number, since it is smaller than the sum of its proper divisors (272448).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

169812 is a wasteful number, since it uses less digits than its factorization.

169812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152 (or 147 counting only the distinct ones).

The product of its digits is 864, while the sum is 27.

The square root of 169812 is about 412.0825160086. The cubic root of 169812 is about 55.3761543343.

The spelling of 169812 in words is "one hundred sixty-nine thousand, eight hundred twelve".