506642 has 4 divisors (see below), whose sum is σ = 759966. Its totient is φ = 253320.

The previous prime is 506629. The next prime is 506647. The reversal of 506642 is 246605.

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., 434281 + 72361 = 659^2 + 269^2 .

It is a super-2 number, since 2×506642² = 513372232328, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (506647) by changing a digit.

506642 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126659 + ... + 126662.

2⁵⁰⁶⁶⁴² is an apocalyptic number.

506642 is a deficient number, since it is larger than the sum of its proper divisors (253324).

506642 is a wasteful number, since it uses less digits than its factorization.

506642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253323.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 506642 is about 711.7878897537. The cubic root of 506642 is about 79.7199583523.

The spelling of 506642 in words is "five hundred six thousand, six hundred forty-two".