605409 has 16 divisors (see below), whose sum is σ = 933888. Its totient is φ = 341712.

The previous prime is 605401. The next prime is 605411. The reversal of 605409 is 904506.

605409 = T₂₇ + T₂₈ + ... + T₁₅₃.

605409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 605409 - 2³ = 605401 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (605401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2554 + ... + 2780.

It is an arithmetic number, because the mean of its divisors is an integer number (58368).

2⁶⁰⁵⁴⁰⁹ is an apocalyptic number.

It is an amenable number.

605409 is a deficient number, since it is larger than the sum of its proper divisors (328479).

605409 is a wasteful number, since it uses less digits than its factorization.

605409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 605409 is about 778.0803300431. The cubic root of 605409 is about 84.5959602160.

The spelling of 605409 in words is "six hundred five thousand, four hundred nine".