424609 has 4 divisors (see below), whose sum is σ = 449604. Its totient is φ = 399616.

The previous prime is 424601. The next prime is 424639. The reversal of 424609 is 906424.

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 138384 + 286225 = 372^2 + 535^2 .

It is a cyclic number.

It is not a de Polignac number, because 424609 - 2³ = 424601 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (424601) 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, 12472 + ... + 12505.

It is an arithmetic number, because the mean of its divisors is an integer number (112401).

2⁴²⁴⁶⁰⁹ is an apocalyptic number.

It is an amenable number.

424609 is a deficient number, since it is larger than the sum of its proper divisors (24995).

424609 is a wasteful number, since it uses less digits than its factorization.

424609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24994.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 424609 is about 651.6202882047. The cubic root of 424609 is about 75.1616660855.

The spelling of 424609 in words is "four hundred twenty-four thousand, six hundred nine".