609121 has 4 divisors (see below), whose sum is σ = 641200. Its totient is φ = 577044.

The previous prime is 609113. The next prime is 609143. The reversal of 609121 is 121906.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 121906 = 2 ⋅60953.

It is a cyclic number.

It is not a de Polignac number, because 609121 - 2³ = 609113 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19), and also a Moran number because the ratio is a prime number: 32059 = 609121 / (6 + 0 + 9 + 1 + 2 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (609101) 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, 16011 + ... + 16048.

It is an arithmetic number, because the mean of its divisors is an integer number (160300).

2⁶⁰⁹¹²¹ is an apocalyptic number.

It is an amenable number.

609121 is a deficient number, since it is larger than the sum of its proper divisors (32079).

609121 is a wasteful number, since it uses less digits than its factorization.

609121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32078.

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 609121 is about 780.4620426388. The cubic root of 609121 is about 84.7685050509.

The spelling of 609121 in words is "six hundred nine thousand, one hundred twenty-one".