505642 has 8 divisors (see below), whose sum is σ = 779076. Its totient is φ = 245952.

The previous prime is 505639. The next prime is 505643. The reversal of 505642 is 246505.

It can be written as a sum of positive squares in 2 ways, for example, as 505521 + 121 = 711^2 + 11^2 .

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

It is a d-powerful number, because it can be written as 5³ + 0 + 6⁷ + 5⁷ + 4⁷ + 2¹⁷ .

It is not an unprimeable number, because it can be changed into a prime (505643) 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, 3343 + ... + 3490.

2⁵⁰⁵⁶⁴² is an apocalyptic number.

505642 is a deficient number, since it is larger than the sum of its proper divisors (273434).

505642 is a wasteful number, since it uses less digits than its factorization.

505642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6872.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 505642 is about 711.0850863293. The cubic root of 505642 is about 79.6674739117.

The spelling of 505642 in words is "five hundred five thousand, six hundred forty-two".