424809 has 24 divisors (see below), whose sum is σ = 766272. Its totient is φ = 220320.

The previous prime is 424777. The next prime is 424811. The reversal of 424809 is 908424.

It is not a de Polignac number, because 424809 - 2⁵ = 424777 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 424809.

It is not an unprimeable number, because it can be changed into a prime (424819) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 387 + ... + 999.

It is an arithmetic number, because the mean of its divisors is an integer number (31928).

2⁴²⁴⁸⁰⁹ is an apocalyptic number.

It is an amenable number.

424809 is a deficient number, since it is larger than the sum of its proper divisors (341463).

424809 is a wasteful number, since it uses less digits than its factorization.

424809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 637 (or 634 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 424809 is about 651.7737337451. The cubic root of 424809 is about 75.1734651552.

It can be divided in two parts, 42 and 4809, that added together give a triangular number (4851 = T₉₈).

The spelling of 424809 in words is "four hundred twenty-four thousand, eight hundred nine".