609442 has 8 divisors (see below), whose sum is σ = 917532. Its totient is φ = 303600.

The previous prime is 609437. The next prime is 609443. The reversal of 609442 is 244906.

It can be written as a sum of positive squares in 2 ways, for example, as 606841 + 2601 = 779^2 + 51^2 .

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

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (609443) by changing a digit.

609442 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 592 + ... + 1252.

2⁶⁰⁹⁴⁴² is an apocalyptic number.

609442 is a deficient number, since it is larger than the sum of its proper divisors (308090).

609442 is a wasteful number, since it uses less digits than its factorization.

609442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1124.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 609442 is about 780.6676629655. The cubic root of 609442 is about 84.7833931227.

The spelling of 609442 in words is "six hundred nine thousand, four hundred forty-two".