145565243 has 4 divisors (see below), whose sum is σ = 150260928. Its totient is φ = 140869560.

The previous prime is 145565227. The next prime is 145565267. The reversal of 145565243 is 342565541.

145565243 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: 342565541 = 383 ⋅894427.

It is a cyclic number.

It is not a de Polignac number, because 145565243 - 2⁴ = 145565227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145565143) 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, 2347796 + ... + 2347857.

It is an arithmetic number, because the mean of its divisors is an integer number (37565232).

Almost surely, 2^145565243 is an apocalyptic number.

145565243 is a deficient number, since it is larger than the sum of its proper divisors (4695685).

145565243 is an equidigital number, since it uses as much as digits as its factorization.

145565243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4695684.

The product of its digits is 72000, while the sum is 35.

The square root of 145565243 is about 12065.0421880738. The cubic root of 145565243 is about 526.0405581549.

The spelling of 145565243 in words is "one hundred forty-five million, five hundred sixty-five thousand, two hundred forty-three".