165270 has 32 divisors (see below), whose sum is σ = 453888. Its totient is φ = 37728.

The previous prime is 165247. The next prime is 165287. The reversal of 165270 is 72561.

It is a Harshad number since it is a multiple of its sum of digits (21).

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

It is a nialpdrome in base 14.

It is a congruent number.

It is an unprimeable number.

165270 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 15 ways as a sum of consecutive naturals, for example, 184 + ... + 603.

It is an arithmetic number, because the mean of its divisors is an integer number (14184).

2¹⁶⁵²⁷⁰ is an apocalyptic number.

165270 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

165270 is an abundant number, since it is smaller than the sum of its proper divisors (288618).

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

165270 is a wasteful number, since it uses less digits than its factorization.

165270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 804.

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 165270 is about 406.5341314084. The cubic root of 165270 is about 54.8779663474.

It can be divided in two parts, 165 and 270, that added together give a triangular number (435 = T₂₉).

The spelling of 165270 in words is "one hundred sixty-five thousand, two hundred seventy".