145340165 has 4 divisors (see below), whose sum is σ = 174408204. Its totient is φ = 116272128.

The previous prime is 145340159. The next prime is 145340179. The reversal of 145340165 is 561043541.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 561043541 = 29 ⋅19346329.

It can be written as a sum of positive squares in 2 ways, for example, as 31427236 + 113912929 = 5606^2 + 10673^2 .

It is a cyclic number.

It is not a de Polignac number, because 145340165 - 2¹⁰ = 145339141 is a prime.

It is a super-2 number, since 2×145340165² = 42247527124454450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14534012 + ... + 14534021.

It is an arithmetic number, because the mean of its divisors is an integer number (43602051).

Almost surely, 2^145340165 is an apocalyptic number.

It is an amenable number.

145340165 is a deficient number, since it is larger than the sum of its proper divisors (29068039).

145340165 is an equidigital number, since it uses as much as digits as its factorization.

145340165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29068038.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 145340165 is about 12055.7108873762. The cubic root of 145340165 is about 525.7692909403.

The spelling of 145340165 in words is "one hundred forty-five million, three hundred forty thousand, one hundred sixty-five".