505766042 has 4 divisors (see below), whose sum is σ = 758649066. Its totient is φ = 252883020.

The previous prime is 505766039. The next prime is 505766057. The reversal of 505766042 is 240667505.

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., 398042401 + 107723641 = 19951^2 + 10379^2 .

It is a junction number, because it is equal to n+sod(n) for n = 505765993 and 505766011.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126441509 + ... + 126441512.

Almost surely, 2^505766042 is an apocalyptic number.

505766042 is a deficient number, since it is larger than the sum of its proper divisors (252883024).

505766042 is a wasteful number, since it uses less digits than its factorization.

505766042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252883023.

The product of its (nonzero) digits is 50400, while the sum is 35.

The square root of 505766042 is about 22489.2428062841. The cubic root of 505766042 is about 796.7398794392.

The spelling of 505766042 in words is "five hundred five million, seven hundred sixty-six thousand, forty-two".