424009 has 4 divisors (see below), whose sum is σ = 438660. Its totient is φ = 409360.

The previous prime is 424007. The next prime is 424019. The reversal of 424009 is 900424.

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 67600 + 356409 = 260^2 + 597^2 .

It is a cyclic number.

It is not a de Polignac number, because 424009 - 2¹ = 424007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (424001) 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, 7282 + ... + 7339.

It is an arithmetic number, because the mean of its divisors is an integer number (109665).

2⁴²⁴⁰⁰⁹ is an apocalyptic number.

It is an amenable number.

424009 is a deficient number, since it is larger than the sum of its proper divisors (14651).

424009 is a wasteful number, since it uses less digits than its factorization.

424009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14650.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 424009 is about 651.1597346274. The cubic root of 424009 is about 75.1262466305.

The spelling of 424009 in words is "four hundred twenty-four thousand, nine".