305273 has 4 divisors (see below), whose sum is σ = 321360. Its totient is φ = 289188.

The previous prime is 305267. The next prime is 305281. The reversal of 305273 is 372503.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 372503 = 137 ⋅2719.

It is a cyclic number.

It is not a de Polignac number, because 305273 - 2⁶ = 305209 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (305243) 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, 8015 + ... + 8052.

It is an arithmetic number, because the mean of its divisors is an integer number (80340).

2³⁰⁵²⁷³ is an apocalyptic number.

It is an amenable number.

305273 is a deficient number, since it is larger than the sum of its proper divisors (16087).

305273 is a wasteful number, since it uses less digits than its factorization.

305273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16086.

The product of its (nonzero) digits is 630, while the sum is 20.

The square root of 305273 is about 552.5151581631. The cubic root of 305273 is about 67.3332325805. Note that the first 3 decimals are identical.

Adding to 305273 its reverse (372503), we get a palindrome (677776).

It can be divided in two parts, 3052 and 73, that added together give a 5-th power (3125 = 5⁵).

The spelling of 305273 in words is "three hundred five thousand, two hundred seventy-three".