509242 has 8 divisors (see below), whose sum is σ = 771732. Its totient is φ = 252000.

The previous prime is 509239. The next prime is 509263. The reversal of 509242 is 242905.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 505521 + 3721 = 711^2 + 61^2 .

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

It is an unprimeable 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 in 3 ways as a sum of consecutive naturals, for example, 1059 + ... + 1462.

2⁵⁰⁹²⁴² is an apocalyptic number.

509242 is a deficient number, since it is larger than the sum of its proper divisors (262490).

509242 is a wasteful number, since it uses less digits than its factorization.

509242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2624.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 509242 is about 713.6119393620. The cubic root of 509242 is about 79.8560954654.

The spelling of 509242 in words is "five hundred nine thousand, two hundred forty-two".