165450 has 24 divisors (see below), whose sum is σ = 410688. Its totient is φ = 44080.

The previous prime is 165449. The next prime is 165457. The reversal of 165450 is 54561.

It is a happy number.

165450 is nontrivially palindromic in base 4.

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

It is not an unprimeable number, because it can be changed into a prime (165457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 402 + ... + 701.

It is an arithmetic number, because the mean of its divisors is an integer number (17112).

2¹⁶⁵⁴⁵⁰ is an apocalyptic number.

165450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

165450 is an abundant number, since it is smaller than the sum of its proper divisors (245238).

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

165450 is a wasteful number, since it uses less digits than its factorization.

165450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1118 (or 1113 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 165450 is about 406.7554547883. The cubic root of 165450 is about 54.8978821417.

Subtracting from 165450 its reverse (54561), we obtain a square (110889 = 333²).

The spelling of 165450 in words is "one hundred sixty-five thousand, four hundred fifty".