305123242 has 32 divisors (see below), whose sum is σ = 512222400. Its totient is φ = 135468288.

The previous prime is 305123237. The next prime is 305123251. The reversal of 305123242 is 242321503.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 181984 + ... + 183652.

It is an arithmetic number, because the mean of its divisors is an integer number (16006950).

Almost surely, 2^305123242 is an apocalyptic number.

305123242 is a deficient number, since it is larger than the sum of its proper divisors (207099158).

305123242 is a wasteful number, since it uses less digits than its factorization.

305123242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1990.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 305123242 is about 17467.7772484080. Note that the first 3 decimals coincide. The cubic root of 305123242 is about 673.2222020842. Note that the first 4 decimals are identical.

Adding to 305123242 its reverse (242321503), we get a palindrome (547444745).

The spelling of 305123242 in words is "three hundred five million, one hundred twenty-three thousand, two hundred forty-two".