165612 has 24 divisors (see below), whose sum is σ = 397936. Its totient is φ = 53568.

The previous prime is 165611. The next prime is 165617. The reversal of 165612 is 216561.

It is a happy number.

165612 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 258 + ... + 630.

2¹⁶⁵⁶¹² is an apocalyptic number.

165612 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

165612 is an abundant number, since it is smaller than the sum of its proper divisors (232324).

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

165612 is a wasteful number, since it uses less digits than its factorization.

165612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417 (or 415 counting only the distinct ones).

The product of its digits is 360, while the sum is 21.

The square root of 165612 is about 406.9545429160. The cubic root of 165612 is about 54.9157940099.

It can be divided in two parts, 165 and 612, that added together give a palindrome (777).

The spelling of 165612 in words is "one hundred sixty-five thousand, six hundred twelve".