145135565 has 4 divisors (see below), whose sum is σ = 174162684. Its totient is φ = 116108448.

The previous prime is 145135553. The next prime is 145135603. The reversal of 145135565 is 565531541.

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

It can be written as a sum of positive squares in 2 ways, for example, as 66618244 + 78517321 = 8162^2 + 8861^2 .

It is a cyclic number.

It is not a de Polignac number, because 145135565 - 2¹⁴ = 145119181 is a prime.

It is a Duffinian number.

It is a Curzon 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, 14513552 + ... + 14513561.

It is an arithmetic number, because the mean of its divisors is an integer number (43540671).

Almost surely, 2^145135565 is an apocalyptic number.

It is an amenable number.

145135565 is a deficient number, since it is larger than the sum of its proper divisors (29027119).

145135565 is an equidigital number, since it uses as much as digits as its factorization.

145135565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29027118.

The product of its digits is 45000, while the sum is 35.

The square root of 145135565 is about 12047.2222939564. Note that the first 4 decimals coincide. The cubic root of 145135565 is about 525.5224609968.

The spelling of 145135565 in words is "one hundred forty-five million, one hundred thirty-five thousand, five hundred sixty-five".