609145 has 8 divisors (see below), whose sum is σ = 756360. Its totient is φ = 470400.

The previous prime is 609143. The next prime is 609149. The reversal of 609145 is 541906.

It can be written as a sum of positive squares in 4 ways, for example, as 2304 + 606841 = 48^2 + 779^2 .

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

It is not a de Polignac number, because 609145 - 2¹ = 609143 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (609143) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1956 + ... + 2245.

It is an arithmetic number, because the mean of its divisors is an integer number (94545).

2⁶⁰⁹¹⁴⁵ is an apocalyptic number.

It is an amenable number.

609145 is a deficient number, since it is larger than the sum of its proper divisors (147215).

609145 is a wasteful number, since it uses less digits than its factorization.

609145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4235.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 609145 is about 780.4774179949. The cubic root of 609145 is about 84.7696183587.

The spelling of 609145 in words is "six hundred nine thousand, one hundred forty-five".