165419 has 4 divisors (see below), whose sum is σ = 167496. Its totient is φ = 163344.

The previous prime is 165397. The next prime is 165437. The reversal of 165419 is 914561.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 165419 - 2¹² = 161323 is a prime.

It is a super-2 number, since 2×165419² = 54726891122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165449) 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, 914 + ... + 1079.

It is an arithmetic number, because the mean of its divisors is an integer number (41874).

2¹⁶⁵⁴¹⁹ is an apocalyptic number.

165419 is a deficient number, since it is larger than the sum of its proper divisors (2077).

165419 is an equidigital number, since it uses as much as digits as its factorization.

165419 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2076.

The product of its digits is 1080, while the sum is 26.

The square root of 165419 is about 406.7173465688. The cubic root of 165419 is about 54.8944532293.

The spelling of 165419 in words is "one hundred sixty-five thousand, four hundred nineteen".