165040 has 20 divisors (see below), whose sum is σ = 383904. Its totient is φ = 65984.

The previous prime is 165037. The next prime is 165041. The reversal of 165040 is 40561.

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (165041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 952 + ... + 1111.

2¹⁶⁵⁰⁴⁰ is an apocalyptic number.

165040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165040 is an abundant number, since it is smaller than the sum of its proper divisors (218864).

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

165040 is a wasteful number, since it uses less digits than its factorization.

165040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2076 (or 2070 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 165040 is about 406.2511538445. The cubic root of 165040 is about 54.8524973331.

The spelling of 165040 in words is "one hundred sixty-five thousand, forty".