505243042 has 4 divisors (see below), whose sum is σ = 757864566. Its totient is φ = 252621520.

The previous prime is 505243031. The next prime is 505243049. The reversal of 505243042 is 240342505.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 402443721 + 102799321 = 20061^2 + 10139^2 .

It is a junction number, because it is equal to n+sod(n) for n = 505242998 and 505243016.

It is not an unprimeable number, because it can be changed into a prime (505243049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126310759 + ... + 126310762.

Almost surely, 2^505243042 is an apocalyptic number.

505243042 is a deficient number, since it is larger than the sum of its proper divisors (252621524).

505243042 is a wasteful number, since it uses less digits than its factorization.

505243042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252621523.

The product of its (nonzero) digits is 4800, while the sum is 25.

The square root of 505243042 is about 22477.6120172940. The cubic root of 505243042 is about 796.4651551357.

Adding to 505243042 its reverse (240342505), we get a palindrome (745585547).

The spelling of 505243042 in words is "five hundred five million, two hundred forty-three thousand, forty-two".