305242 has 8 divisors (see below), whose sum is σ = 523296. Its totient is φ = 130812.

The previous prime is 305237. The next prime is 305243. The reversal of 305242 is 242503.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 10888 + ... + 10915.

It is an arithmetic number, because the mean of its divisors is an integer number (65412).

2³⁰⁵²⁴² is an apocalyptic number.

305242 is a deficient number, since it is larger than the sum of its proper divisors (218054).

305242 is a wasteful number, since it uses less digits than its factorization.

305242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21812.

The product of its (nonzero) digits is 240, while the sum is 16.

The square root of 305242 is about 552.4871039219. The cubic root of 305242 is about 67.3309533082.

Adding to 305242 its reverse (242503), we get a palindrome (547745).

The spelling of 305242 in words is "three hundred five thousand, two hundred forty-two".