509442 has 16 divisors (see below), whose sum is σ = 1026432. Its totient is φ = 168560.

The previous prime is 509441. The next prime is 509449. The reversal of 509442 is 244905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (509441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 967 + ... + 1397.

It is an arithmetic number, because the mean of its divisors is an integer number (64152).

2⁵⁰⁹⁴⁴² is an apocalyptic number.

509442 is an abundant number, since it is smaller than the sum of its proper divisors (516990).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

509442 is a wasteful number, since it uses less digits than its factorization.

509442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 633.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 509442 is about 713.7520577904. The cubic root of 509442 is about 79.8665483403.

The spelling of 509442 in words is "five hundred nine thousand, four hundred forty-two".