145165 has 4 divisors (see below), whose sum is σ = 174204. Its totient is φ = 116128.

The previous prime is 145139. The next prime is 145177. The reversal of 145165 is 561541.

145165 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 561541 = 349 ⋅1609.

It can be written as a sum of positive squares in 2 ways, for example, as 51529 + 93636 = 227^2 + 306^2 .

It is a cyclic number.

It is not a de Polignac number, because 145165 - 2⁵ = 145133 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14512 + ... + 14521.

It is an arithmetic number, because the mean of its divisors is an integer number (43551).

2¹⁴⁵¹⁶⁵ is an apocalyptic number.

It is an amenable number.

145165 is a deficient number, since it is larger than the sum of its proper divisors (29039).

145165 is an equidigital number, since it uses as much as digits as its factorization.

145165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29038.

The product of its digits is 600, while the sum is 22.

The square root of 145165 is about 381.0052493077. The cubic root of 145165 is about 52.5557985733. Note that the first 3 decimals are identical.

The spelling of 145165 in words is "one hundred forty-five thousand, one hundred sixty-five".