424409 has 4 divisors (see below), whose sum is σ = 426960. Its totient is φ = 421860.

The previous prime is 424397. The next prime is 424423. The reversal of 424409 is 904424.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 424409 - 2¹² = 420313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (424429) 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, 1007 + ... + 1364.

It is an arithmetic number, because the mean of its divisors is an integer number (106740).

2⁴²⁴⁴⁰⁹ is an apocalyptic number.

It is an amenable number.

424409 is a deficient number, since it is larger than the sum of its proper divisors (2551).

424409 is a wasteful number, since it uses less digits than its factorization.

424409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2550.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 424409 is about 651.4668065220. The cubic root of 424409 is about 75.1498633100.

The spelling of 424409 in words is "four hundred twenty-four thousand, four hundred nine".