165912 has 32 divisors (see below), whose sum is σ = 430080. Its totient is φ = 53280.

The previous prime is 165901. The next prime is 165931. The reversal of 165912 is 219561.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a plaindrome in base 14.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 633 + ... + 855.

It is an arithmetic number, because the mean of its divisors is an integer number (13440).

2¹⁶⁵⁹¹² is an apocalyptic number.

165912 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 165912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (215040).

165912 is an abundant number, since it is smaller than the sum of its proper divisors (264168).

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

165912 is a wasteful number, since it uses less digits than its factorization.

165912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263 (or 259 counting only the distinct ones).

The product of its digits is 540, while the sum is 24.

The square root of 165912 is about 407.3229676804. The cubic root of 165912 is about 54.9489333163.

The spelling of 165912 in words is "one hundred sixty-five thousand, nine hundred twelve".