165413 has 4 divisors (see below), whose sum is σ = 168588. Its totient is φ = 162240.
The previous prime is 165397. The next prime is 165437. The reversal of 165413 is 314561.
It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 314561 = 13 ⋅24197.
It can be written as a sum of positive squares in 2 ways, for example, as 40804 + 124609 = 202^2 + 353^2 .
It is a cyclic number.
It is not a de Polignac number, because 165413 - 24 = 165397 is a prime.
It is a super-2 number, since 2×1654132 = 54722921138, which contains 22 as substring.
It is a Duffinian number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (165443) 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 3 ways as a sum of consecutive naturals, for example, 1508 + ... + 1613.
It is an arithmetic number, because the mean of its divisors is an integer number (42147).
2165413 is an apocalyptic number.
It is an amenable number.
165413 is a deficient number, since it is larger than the sum of its proper divisors (3175).
165413 is an equidigital number, since it uses as much as digits as its factorization.
165413 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 3174.
The product of its digits is 360, while the sum is 20.
The square root of 165413 is about 406.7099703720. The cubic root of 165413 is about 54.8937895194.
Adding to 165413 its reverse (314561), we get a palindrome (479974).
The spelling of 165413 in words is "one hundred sixty-five thousand, four hundred thirteen".
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