609545 has 4 divisors (see below), whose sum is σ = 731460. Its totient is φ = 487632.

The previous prime is 609541. The next prime is 609571. The reversal of 609545 is 545906.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 259081 + 350464 = 509^2 + 592^2 .

It is a cyclic number.

It is not a de Polignac number, because 609545 - 2² = 609541 is a prime.

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 609545.

It is not an unprimeable number, because it can be changed into a prime (609541) 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, 60950 + ... + 60959.

It is an arithmetic number, because the mean of its divisors is an integer number (182865).

2⁶⁰⁹⁵⁴⁵ is an apocalyptic number.

It is an amenable number.

609545 is a deficient number, since it is larger than the sum of its proper divisors (121915).

609545 is a wasteful number, since it uses less digits than its factorization.

609545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121914.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 609545 is about 780.7336293513. The cubic root of 609545 is about 84.7881691843.

The spelling of 609545 in words is "six hundred nine thousand, five hundred forty-five".