305241 has 4 divisors (see below), whose sum is σ = 406992. Its totient is φ = 203492.

The previous prime is 305237. The next prime is 305243. The reversal of 305241 is 142503.

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: 142503 = 3 ⋅47501.

It is a cyclic number.

It is not a de Polignac number, because 305241 - 2² = 305237 is a prime.

It is a D-number.

305241 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 305241.

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, 50871 + ... + 50876.

It is an arithmetic number, because the mean of its divisors is an integer number (101748).

2³⁰⁵²⁴¹ is an apocalyptic number.

It is an amenable number.

305241 is a deficient number, since it is larger than the sum of its proper divisors (101751).

305241 is a wasteful number, since it uses less digits than its factorization.

305241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101750.

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 305241 is about 552.4861989227. The cubic root of 305241 is about 67.3308797808.

Adding to 305241 its reverse (142503), we get a palindrome (447744).

The spelling of 305241 in words is "three hundred five thousand, two hundred forty-one".